a) There are three nucleotide in each codon, and each of these nucleotides can have one of four different bases. How many possible unique codons are there?
b) If DNA had only two types of bases instead of four, how long would codons need to be to specify all 20 amino acids?

Answers

Answer 1

Answer:

Explanation:

There are 64 possible codons to be specified for, If we have three nucleotides with 4 bases the set of all combinations can encode

4x4x4 = 64 amino acids

This will give 64 different combinations of four nucleotides

If we have 2 bases with 4 nucleotide we have a possibility of having 16 codons specifying for 20 amino acid.

If we have 2 nucleotides with 4 bases the set of combination is

4×4 = 16 amino acids of four nucleotides


Related Questions

What do amino acids, fatty acids, and sugars (monosaccharides) have in common?

A. They are made of carbon, oxygen, and nitrogen.
B. They are made of carbon, oxygen, and hydrogen.
C. They are used to make lipids.
D. They are used to make proteins.

Answers

Answer:

Explanation:

C. They are used to make lipids.

What amino acids, fatty acids, and sugars (monosaccharides) have in common is that they are made of carbon, oxygen, and hydrogen which is option B.

Amino acids are the basic structural units of proteins. Each amino group (-NH₂) and a carboxyl group (-COOH) in its molecule. Thus, from the molecular structure of an amino acid, the carboxyl group of the molecule contains carbon, oxygen and hydrogen elements.

Fatty acids are commonly found in lipids ans are made up of long chain alkanoic acids of general formular, RCOOH where R contains about 10 to 18 carbon atoms. the terminal  -COOH group contains carbon, oxygen and hydrogen elements.

Sugars (monosaccharides): they are naturally occuring organic compounds containing carbon, hydrogen and oxygen, with the hydrogen and oxygen present in the ratio of 2:1.  The general formula for monosaccharides is C₆H₆O₁₂.

Therefore, amino acids, fatty acids, and sugars (monosaccharides) have carbon, oxygen, and hydrogen in common.

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Which structures are highlighted? Which structures are highlighted? pulmonary arterioles alveoli bronchioles pulmonary capillaries

Answers

Hello. You forgot to put the image that complements this question. The image is attached below:

Answer:

pulmonary arterioles

Explanation:

Pulmonary arterioles are small blood vessels located in the lung. They appear as branches of the major arteries and have the main function of releasing blood from capillaries, in addition to regulating blood flow and peripheral blood pressure in capillaries.

It is important to note that arterioles are very small in size, which facilitates their functions to be performed efficiently and quickly.

Is zinc renewable or not?

Answers

Answer:  Zinc is  non renewable.

Explanation:

Non-Renewable resources are resources that cannot be replenished easily through natural process. These are the sources which are used in wise manner so that they do not get depleted. For example: coal, petroleum etc.

Renewable resources are resources that can be replenished overtime through natural process.These are the sources which never depletes completely. For example: bio mass energy, solar energy etc.

As zinc cannot be replenished easily through natural process, it is  non renewable.

why can animals move and plants can't?​

Answers

Answer:

Plants make their own food from sunlight, water, and carbon dioxide (part of the air). Making food like that is slow, so if they moved around too quickly, they'd starve to death. So, though they do move, it's usually very slowly.

Animals get their food from plants or from other animals. Moving around is a way for them to get more food, not just to use it up. It's also a way to avoid getting eaten.

(Even plants which appear to "eat" food, such as a venus flytrap, are actually only getting vitamins and minerals that way, not extra energy.)

A persons thoughts are central to which type of therapy?

Answers

Answer:

Cognitive therapy

Explanation:

is a form of psychotherapy that focuses on how a person's thoughts lead to feelings of distress. The idea behind cognitive therapy is that how you think determines how you feel and act. Cognitive therapists help their clients change dysfunctional thoughts in order to relieve distress.

If bacteria transformed with a recombinant pUC18 plasmid produce white colonies when grown on plates containing ampicillin and Xgal, which of the following is least likely?

a. They produce β-lactamase that provides resistance to ampicillin.
b. They carry a vector that contains a DNA fragment inserted into the multiple cloning site.
c. They produce functional β-galactosidase that cleaves X-gal.
d. They carry a vector with a lacZ gene that has been disrupted and rendered nonfunctional.
e. They carry a vector with the bla gene used as the selectable marker.

Answers

Answer:

c. They produce functional β-galactosidase that cleaves X-gal.

Explanation:

β-galactosidase is an enzyme capable of catalyzing the enzymatic hydrolysis of β-galactosides into monosaccharides by hydrolyzing the β-glycosidic bond. On the other hand, X-gal is an analog of lactose composed of galactose, which is widely used in laboratories for the detection of β-galactosidase. In the presence of β-galactosidase, X-gal is hydrolyzed by cleaving its β-glycosidic bond, thereby confirming the presence of β-galactosidase.

Distinguish between the 4 major modes of nutrition of prokaryotes and identify each modes energy source and carbon source as well as giving an example

Answers

The four major modes of nutrition in prokaryotes are photoautotrophic, chemoautotrophic, photoheterotrophic, and chemoheterotrophic. Their differences, energy source and carbon source are explained below:

WHAT ARE PROKARYOTES?

Prokaryotes are a group of organisms that do not have their genetic material enclosed in a membrane bound NUCLEUS. They include bacteria, archeae etc.

METABOLISM IN PROKARYOTES:

All organisms, prokaryotes inclusive, need energy for their metabolic activities. They also need carbon. Hence, based on their carbon and energy source, prokaryotes can be:

Photoautotrophic: These are prokaryotic organisms that use carbon dioxide as their carbon source and light as their energy source. Example is

cyanobacteria.

Chemoautotrophic: These are prokaryotic organisms that act on inorganic substances as energy source and use carbon dioxide as carbon source. Example is Nitrosomonas bacteria.

Photoheterotrophic: These are prokaryotic organisms that use light as source of energy but obtain carbon from other organisms (organic sources). Examples are heliobacteria, sulfur bacteria.

Chemoheterotrophic: These are prokaryotic organisms that act on inorganic substances as energy source but derive their carbon source from organic compounds (other organisms).

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The arboreal hypothesis proposes that defining primate characteristics were adaptations to life in the trees, such as Group of answer choices grasping hands, tails, and intelligence. developed vision, greater sense of smell, and grasping hands and feet. grasping hands and feet, developed vision, and greater intelligence. developed vision, greater sense of smell, and tails.

Answers

Answer:

The arboreal hypothesis proposes that defining primate characteristics were adaptations to life in the trees, such as

grasping hands and feet

developed vision

greater intelligence

Paleobiologists generally recognize the five most severe mass extinctions during the Phanerozoic Eon. Along with the other students in this class, determine when each of these “Big Five” mass extinctions occurred. Include in the discussion a brief list of which organisms went extinct during each of these events and which organisms radiated afterwards. You should use the information from this unit and from Internet searches to help you in this discussion. NO plagiarism will be permitted.

Answers

Extinction of the Ordovician: This extinction was responsible for the disappearance of about 60-70% of the species of oceanic life, This is because in that period most of the life on Earth was in the ocean. This extinction is believed to have been caused by an intense glacial period, although short that froze most of the planet's water. It is believed that the species most affected were sponges, algae, jawless fish, molluscs and cephalopods.

Devonian Extinction: Responsible for the disappearance of about 75% of marine species. This extinction was caused by the depletion of oxygen in the ocean, making life impossible for all aerobic marine organisms. This depletion of oxygen was caused mainly by the variation in the level of the ocean and climatic changes that may have been caused by asteroids.

Permian Extinction: Responsible for the death of 95% of life on earth. This extinction is known as the "mother of all extinctions" due to its destructive character, which devastated life on land and in the ocean. It is believed that this extinction was caused by volcanic activities triggered by the impact of asteroids. Almost all living species on earth were affected, such as insects, trilobites, sharks, boneless fish, reptiles, among others.

Extinction of the Triassic: It is not known exactly what caused this extinction, but it is estimated that it had the power to decimate 70-80% of terrestrial life, mainly arcosaurs and amphibians. The most accepted theory today is that the extinction was caused by recurrent volcanic activities that influenced huge volumes of carbon dioxide in the atmosphere, generating intense heating.

Cretaceous extinction: It was caused by the impact of an asteroid with the earth. The impact had the power to exterminate 75% of terrestrial life. This is the most well-known extinction, since it was responsible for decimating dinosaurs, however, some animals survived this impact, such as most marine species, frogs, birds, reptile and mammals.

What is better sexual or asexual? Reproductive

Answers

Answer:

to reproduce sexual is better

Explanation:

i think if your asexual you don't feel attraction so you probably wont have intercourse and not reproduce whereas if your sexual you will

Answer:

tough question

Explanation: asexual is a broad broad broad spectrum some people who are ace are willing to have intercourse just wont find pleasure in it or some people are willing to have intercourse every once in a while or when they feel like it so technically ace people can reproduce just probably more likely that they wont but the question is also probably not the best because not all ace people are the same

Place the following materials in the order in which they are likely to fossilize. Begin with the material that is most likely to fossilize, and finish with the material least likely to fossilize.
1. mammal teeth
2. bones of an adult mammal quickly buried
3. bones of an adult mammal left on the surface
4. soft body parts of any animal

Answers

Answer: correct order--->

1)mammal teeth

2.)bones of an adult mammal quickly buried

3.) bones of an adult mammal left on the surface

4.)soft body parts of any animals

Explanation:

Fossilization is the ability of an organism to be preserved and remain unaltered for a very long time. Through research , it has been found out that Harder  parts of the body tend to remain preserved for a long time  because they  naturally have minerals deposited in them and may only be reduced,  but the softer part or tissues do not get preserved for a long time because being made up of polymer can be disintegrated easily by natural biological and physical processes.

The order of which material will likely fossilize is

1.)mammal teeth

2.)bones of an adult mammal quickly buried

3.) bones of an adult mammal left on the surface

4.)soft body parts of any animals

Reason,

--Teeth and bones biologically contain calcium but the teeth is more tougher and durable than the bone, Even when a  body is decomposed, the teeth most times are not  affected at all.

Bones of an adult mammal left on the surface will decompose faster than the one buried because of the biological (natural decomposing ) and physical processes(temperature, wind, sunglight, rainfall ) which will both act on it at the same time because of its exposure.

- soft body parts of any animals will decompose fastest as bacteria will feed on it immediately since it lacks minerals that can elongate preservation.

Which macromolecule forms a double layer as the primary structure of cell membranes?
fats
oils
phospholipids
steroids​

Answers

Answer:

phospholipids

Explanation:

Answer:

C. phospholipids

Explanation:

The other person said it

can someone tell me what crabs these are.

Answers

Answer:

Loxorhynchus grandis

They look like “ Liocarcinus “

What type of muscle is found in the circulatory system?

Answers

Answer:

The heart is the pump and the vessels are the delivery and return system for the blood. Every tissue in the body, directly or indirectly, receives oxygen and nutrients from blood supplied by the cardiovascular system. The heart is a muscle. The muscle is a modified form of skeletal muscle called cardiac muscle.

Explanation:

i hope itt help you

Answer:

blood muscles are found

The Middle Latitudes have:

Answers

Answer:

The Middle Latitudes have cyclones and anticyclones

Explanation:

The Middle Latitude is a spatial region of the earth which are found between the tropics and the polar circles.

The climate in this region of the earth is usually very windy thereby forming cyclones and in serious conditions typhoons and hurricanes. The Middle Latitude is thereby characterized by cyclones and anticyclones.

Compare the types of biological macromolecules and their functions.

Answers

there are four main classes

carbohidrates -built from small molecular units that are connected to each other by a strong covelent bonds.

lipids-lipids are molecules that contain hydrocarbons and make up the building blocks of the structure and functions of living cells

protiens -built from small molecular units that are connected to each other by a strong covelent bonds.

nucleic acids -built from small molecular units that are connected to each other by a strong covelent bonds.

ABO blood type is examined in a Taiwanese population, and allele frequencies are determined. In the population,
f (IA) = 0.30,
f(IB) = 0.15, and
f (i) = 0.55.
What are the frequencies of the various genotypes and various phenotypes in this population? Assume Hardy-Weinberg equilibrium.

Answers

Answer and Explanation:

Due to technical problems, you will find the answer and explanation in the attached file.

Is the scorpion vertebrate ? ​

Answers

Answer:

scorpions are invertebrates but are insects

Answer:

A animal that is an vertebrate has a spine, and backbone. Some of these animals can be humans, dogs, cats, etc. But most 6 legged creatures, 8 legged creatures do not have a backbone.

To answer your question, no, scorpions are not vertebrates because they do not a spine and backbone.

YA'LL ARE SMART!!! PLEASE HELP!!!!

Answers

Answer:

not malleable

Explanation:

hope this helps

Answer:

D because it can be transformed into many forms

so is malleable

Which element would you expect to have a higher electronegativity than nitrogen (N)?
O Fluorine (F)
Cesium (Cs)
O Boron (B)
O Phosphorous (P)

Answers

Answer:

flourine ( F)

Explanation:

flourine has higher electronegativity than nitrogen (N)

Fluorine (F) because of the electronegativity of atoms to increase

How does the wheat stem rust fungus harm its host plant?

Answers

Answer:

The stem rust fungus produces several different structures during its life cycle. The most obvious of these on wheat are the reddish-colored urediniospores that form on leaves, stems, and heads during the growing season. These spores are spread by wind and infect wheat or barley plants.

After arousal by a sensory stimulus, consciousness can be maintained by positive feedback, because of activity in the

Answers

Answer:

This question lacks options, options are:

A) cerebral cortex.

B) basal nuclei.

C) sensory pathways.

D) motor pathways.

E) All of the answers are correct.

The correct answer is E.

Explanation:

The cerebral cortex processes and filters its information before passing the most relevant aspects to other regions of the brain. Some of these brain regions, in turn, send information back to the cortex. These loops, known as 'feedback systems', are considered essential for the functioning of cortical networks and their adaptation to new sensory information. Neural circuits must first assess the importance of incoming sensory information and then refine how it is processed in the future. Positive feedback, triggered with the purpose of amplifying the response to the initial stimulus, can be compared to a chain reaction or a vicious circle. Few are the functions regulated by this mechanism; rather it is triggered in pathological situations. It is the system by means of which the organism very rarely regulates any of the bodily functions under normal conditions, making the initial stimulus to be maintained and even increased. This type of mechanism is predominantly present in pathological situations: Its constitutive elements are: stimulus, receptor, afferent pathway, integrating center, efferent pathway, effector and response. The response does not have the ability to satisfy the initial stimulus.

Othologous. are found where?

Answers

Answer:

Explanation:

Science (genetics, molecular biology, genomics) genes or gene products that are homologous (descended from a common ancestor) and are found in separate species due only to the speciation event (not to gene duplication).

Answer:

I think youcan collect the genes from two species and compare each gene to one another and if two genes identify each other. I never really heard of them being found but created srry if this isnt any help you can delete my question if needed

Explanation:

Describe the parts of the building blocks of lipid

Answers

Answer:

Glycerol and fatty acids are the basic building blocks of fats (lipids). Fats are the product of the esterification of the trivalent alcohol glycerol with fatty acids of different lengths (between 12 and 20 carbon atoms). Two important representatives of the lipids are triglyceride (90% of fats) and cholesterol.

You palpate a soft, slightly tender mass in the right scrotum of an adult male. You attempt to reduce the size of the mass, and there is no change in the mass size. Your next assessment maneuver is to:________
a. use two fingers to attempt to reduce the mass.
b. palpate the left scrotum simultaneously.
c. lift the right testicle and then compare pain level.
d. transilluminate the mass

Answers

Answer:

d. transilluminate the mass

Explanation:

Sometimes, painless hard or tender mass develop in the scrotum of men and can cause testicular tumors.

After detecting a scrotal mass, to reduce the size of the mass, the next assessment required is to transilluminate the mass in which testicles will be appear opaque on transillumination. Transillumination of mass will help to detect the orientation of mass which can be treated further.

Hence, the correct answer is d. transilluminate the mass

Sources of geothermal power are

Answers

Answer:

Geothermal energy is produced by the heat of Earth's molten interior. This energy is harnessed to generate electricity when water is injected deep underground and returns as steam (or hot water, which is later converted to steam) to drive a turbine on an electric power generator.

What two factors must be internally balanced for survival? a) energy and water b) water and materials c) materials and age d) materials & energy

Answers

Answer:        b is the answer hope i helped :)

If this is correct can I get brainlist pls and thank you

have a blessed day :) d

Explanation:

A mangrove swamp is more likely to exist along shores of which location?

Answers

They are likely to exist in tropical and subtropical tidal areas

Which of the following characteristics of living things is very important for a group or organisms, but not a single organism?

A: Living things respond to their environment.

B: Living things are made up of units called cells.

C: Living things maintain internal balance.

D: Living things reproduce

Answers

Answer:

D.

Explanation:

Because living things is responsible for reproduction

The characteristics of living things that is very important for a group of organisms, but not a single organism is their ability to reproduce.

LIVING THINGS:

Living things are characterized by certain processes that define them. This means that all organisms considered living must be able to fulfill these processes.

Some of the characteristics of living things include:

Ability to reproduceAbility to respond to stimuliAbility to perform homeostasis

Among these characteristics, the ability to reproduce is more important for a group of organisms rather than an individual because reproduction involves the multiplication of organisms.

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A.While the traits studied in Exercise 1 were hypothetical genetic traits, what type of genetic traits do you think are important to study and predict

Answers

Answer:

Genetic disturbances harmful to the organism are genetic characteristics that must be studied and predicted.

Explanation:

Genetic disorders that harm an organism such as sickle cell anemia, hemophilia, Turner syndrome, among others, are important to be studied and predicted, because it will provide better maintenance of that organism. Allowing people who inherit these characteristics to have more efficient treatments and a better life, since the prediction of these characteristics allows the family to establish better adapapitativo methods, that will make the life of this individual easier and with more quality.

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