Which of the following pairs of base sequences could form a short stretch of a normal double helix of DNA?
(A) 5′-AGCT-3′ with 5′-TCGA-3′
(B) 5′-GCGC-3′ with 5′-TATA-3′
(C) 5′-ATGC-3′ with 5′-GCAT-3′
(D) All of these pairs are correct
Answer:
The correct option is C
Explanation:
First of all, we need to know that a DNA molecule can have the following bases; Adenine (A), Thymine (T), Guanine (G) and cytosine (C). These bases have the ability to bind to each other on complementary strands in the following way; adenine can only bind to thymine and vice versa while guanine can only bind to cytosine and vice versa.
It also be noted that when one strand of the DNA runs from 5' to 3', the complementary strand runs from 3' to 5', hence they run anti-parallel to each other.
So, the only option sequence that meets the criteria discussed above is option C,
5'-ATGC-3'
3'-TACG-5'
The illustration above shows how the bases will be on the complimentary strands when they run anti-parallel to each other. And they can also be written as 5′-ATGC-3′ (this is read the way it is written) and 5′-GCAT-3′ (this is read from the back as in from 3' to 5')
If you were born with an extra finger, which organic molecule was responsible for this malformation
Answer:
Nucleic acid would be responsible.
Explanation:
Based on the results of the mouse coloration case study, suggest another hypothesis researchers
might use to further study the role of predators in the natural selection process.
Another hypothesis suggested by researchers that can be used to further study the role of predators in the natural selection process is the study of the total or partial absence of predators, visualizing the response in the environment.
What is the role of predators?Predators can act by controlling the population size of some species. When the population size of their prey begins to decrease, many species seek to feed on prey that are in greater abundance in the environment.
With this information, we can conclude that another hypothesis suggested by researchers that can be used to further study the role of predators in the natural selection process is the study of the total or partial absence of predators, visualizing the response in the environment.
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Molecules are the smallest classification of matter (True/False) True False
Answer:
false because atom are the smallest classification of matter
To understand how the scientific method can be used to search for explanations of nature An astrology-loving friend hypothesizes that people born in that week like horror movies more than other genres of movies. You decide to use the scientific method to test this hypothesis.
The scientific method is a procedure used to search for explanations of nature. The scientific method consists of making observations, formulating hypotheses, designing and carrying out experiments, and repeating this cycle.
Observations can be either quantitative or qualitative. Quantitative observations are measurements consisting of both numbers and units, such as the observation that ice melts at 0°C. In contrast, qualitative observations are observations that do not rely on numbers or units, such as the observation that water is clear.
A hypothesis is a tentative explanation of the observations. The hypothesis is not necessarily correct, but it puts the scientist's understanding of the observations into a form that can be tested through experimentation.
Experiments are then performed to test the validity of the hypothesis. Experiments are controlled procedures, preferably made under conditions in which the variable of interest is related to hypothesis .
In the course of a conversation, you observe that three of your friends like horror movies. Horror movies happen to be your favorite type of movie as well. You also know that all of these friends were born in the same week that you were, even in the same year.
An astrology-loving friend hypothesizes that people born in that week like horror movies more than other genres of movies. You decide to use the scientific method to test this hypothesis. What should you do next?
A. Come up with a theory to explain birth week.
B. Perform experiments to test your.
C. Propose several alternative hypotheses.
D. Refine your hypothesis.
Answer:
B. Perform experiments to test your hypothesis
Explanation:
Scientific experiments involves using scientific method, which is an outlined manner of conducting an experiment. The scientific method consists of series of steps starting from making observation, followed by formulating an hypothesis, and then carrying out the experiments (as stated in the question).
According to this question, an observation that that three friends who were born in the same week like horror movies has been made. Using the scientific method, this was followed by formulating an hypothesis that "people born in that week like horror movies more than other genres of movies". Hence, this hypothesis will be tested out next by conducting an experiment.
The experiment will prove/disprove the hypothesis (a testable explanation). A way to carry out the experiment is by finding out if other people born in the same week as your friends like horror movies.
Question 23
CHALLENGE QUESTION
An infant weighs 5.45 kg and needs an oral medication of 0.25 teaspoon per pound.
How many mL do you administer?
HINT: Step 1) convert kg to pounds; Step 2) find tsp of medication needed; Step 3) convert tsp
to ml.
50 m
15 ml
9 ml
Can anyone help me understand why it was 15?
Answer:
5.45 kg x (2.2 pounds/1 kg) x (0.25 tsp/1 pound) x (5 mL/1 tsp) = 14.98 or approx. 15 mL
Which statement correctly describes a characteristic that a scientific
measuring tool should have?
A. To be accurate, it must be able to make measurements repeatedly
over a long period of time.
B. To be precise, it must use small units to take measurements.
C. To be precise, it must be able to make measurements using very
large units.
D. To be accurate, it must be able to make measurements using very
small units.
Answer: Option A.
Explanation:
Scientific measuring tools refers to the equipments or tools use to measure quantities in science examples include measuring cup, measuring cylinder, e.t.c.
The characteristic that describe Scientific tool is that To be accurate, it must be able to make measurements repeatedly over a long period of time because accuracy is how close the measurements for a value is to the correct value and it must take measurements for long period of time without errors.
Researchers studying microbial activity at another active oil-spill site found decreasing levels of methane over the course of several months, but no changes in oxygen saturation in any of their repeated samples. How should they interpret these results
Answer:
Methanotrophs.
Explanation:
Methanotrophs are those microbes (bacteria) which feeds on methane or used methane as energy source for their survival. These type of microbes survive by using single carbon compound as a source of energy. So we can say that due to the presence of Methanotrophs, the level of methane decreases while there is no change occurs in oxygen saturation level.
Which is NOT a characteristic of all living things?
Answer:
Living things grow or develop.
Non-living things do not.
Answer:
Not reproducing
How do proteins become embedded in the membrane of the endoplasmic reticulum?a. by splicing of proteins on either side of the ER membrane.b. via stop- and start-transfer sequences that stop and start translocation of a polypeptide through the ER membrane, resulting in transmembrane proteins.c. by post-translational import can results in a transmembrane ER protein.d. by protein chaperones that insert polypeptides into the ER membrane.e. via transit sequences that target polypeptides made in the cytosol for the ER membrane.
Answer:
The correct answer is b.
Explanation:
The signal peptide acts as an initiator of the transfer. Proteins whose first destination is the endoplasmic reticulum have a signal peptide at their amino terminal end that includes a sequence composed of 5 to 10 hydrophobic amino acids, which is recognized by a receptor of this organelle that opens a channel in its membrane allowing such proteins to can get through it. Most of these proteins will then continue their course towards the Golgi apparatus, but those that also have a certain sequence of four amino acids (-Lys-Asp-Glu-Leu-COOH) at their other end (carboxyl terminal) are retained in the endoplasmic reticulum as proteins of this organelle. The transfer stop peptide anchors the protein on the membrane after the ER signal peptide (transfer initiator) is released from the translocator and removed.
In order for something to be classified as "Organic," it would need to contain what element?
Answer:
To be classified as organic, it would have to contain the element carbon :)
How do you think tomato plants detect pests on a neighboring plant so they can protect themselves? I NEED ANSWER FAST PLEASE
Answer:
"Some, like tomato plants, release chemicals like methyl jasmonate that not only taste bad to pests, but alert their leafy neighbors to trouble. As other plants detect the chemicals, they crowdsource a solution: producing mass amounts of deterrent chemical compounds, just in case the pests come calling." - LAURIE L. DOVE
A tomato plant detects pests with the help of a signaling cascade that liberates essential chemicals and allows it to protect itself from such harmful and toxic pests.
What are Pests?Pests may be defined as any type of living organism generally insects that completely destructs crops, foods, and livestock because of their toxic and poisonous effect.
A tomato plant uses the mechanism of a signaling cascade that liberates chemicals like methyl jasmonate which is bad in taste for pests.
This chemical is sensed by the neighboring plants of this tomato plant, which then initiate their defense mechanisms in order to protect themselves from this type of pest.
Therefore, in this way, the detection of pests by tomato plants helps their neighboring plant as well as ensures their protection.
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Determine of the statement is true or false, and why. Nitrogen makes up most of the atmosphere, but is in an unusable form until converted into an organic form by bacteria.
A. False, it should read, "Nitrogen makes up most of the atmosphere, and is easily converted into an organic form by plants."
B. False, it should read, "Nitrogen makes up a small percentage of the atmosphere, but comes in an easily usable form for most living organisms."
C. True.
D. False, it should read, "Nitrogen makes up most of the atmosphere, in a form easily accessible to plants, who convert for animals to use."
Answer:
C. True.
Explanation:
It should be understood that the the percentage of nitrogen is the highest in the atmosphere. This is because, it make up of more than 60% of the atmosphere. And it should be noted that the atmospheric nitrogen is inform that can not be used by the plant.
Therefore, there is a need for a certain group of bacteria which live in the root noodles of the plants to convert the unused form of the atmospheric nitrogen to a form that can be used by the plants.
One gene possesses only two alleles.
A. True
B. False
An injury to the neurons of a collateral ganglion would affect the functions of which organ?a) heart.
b) pupils.
c) sweat glands.
d) digestive tract.
e) arrector pili muscles.
The answer is D. Digestive tract
What is a gene?
A-the different forms of a trait
B-a segment of DNA that is the basic unit of heredity
C-the appearance of characteristics that are seen in an organism
D- an organism allele combination
Answer:
step by step
Explanation:
B is the answer
Answer:
B: a segment of DNA that is the basic unit of heredity
Explanation:
Describe cellular respiration. How do plants and animals help each other in cellular respiration?
Answer:
The oxygen produced by plants during photosynthesis is what humans and animals inhale for the blood to transport to the cells for respiration. ... The process of photosynthesis is used by plants and other photosynthetic organisms to produce energy, whereas the process of cellular respiration breaks down the energy for use.
Explanation:
Answer:
Cellular respiration is the process through which cells convert sugars into energy. To create ATP and other forms of energy to power cellular reactions, cells require fuel and an electron acceptor which drives the chemical process of turning energy into a useable form.Plants take carbon dioxide during photosynthesis and release oxygen into the atmosphere. Animals and plants take oxygen and release carbon dioxide during respiration. Thus, both plants and animals help each other in the exchange of gases in the atmosphere.
What is the pH of a neutral solution?
7
10
14
Answer:
The answer would be 7.
Explanation:
Answer:
7
Explanation:
The answer is 7. For example, water is neutral, so it has a pH of 7.
The study of environmental science must involve discussion of human culture and people's opinions on politics and economics. True False
Answer:
This sentence is FALSE: The study of environmental science must involve discussion of human culture and people's opinions on politics and economics.
→ The study of environmental science involve the natural components of Earth and also the connections between them.
Ideas of the atom have changed over time. Which idea do scientists now consider inaccurate? Electrons are arranged in layers. Electrons have a negative charge. An atom is solid material. The nucleus is the center of the atom.
Answer:
an atom is a solid material
Explanation:
i just took the test and initally i had put the answer that the person who had first answered had said which was "electrons are arranged in layers", and i got it wrong. the correct answer was supposed to be "an atom is a solid material".
Ima see how long it takes for someone to delete my answer from this moment forward
Btw I didn't feel like doing the work but an atom is solid material kk
7) How do nitrogen-fixing bacteria help cycle
340
nitrogen through ecosystems?
320
A. They change nitrogen into forms usable by
plants
300
1950
B. They convert water and carbon dioxide into
sugar
C. They release the chemical energy in nitrogen for respiration
D. They convert sunlight into chemical energy stored in nitrogen
19
Answer:
A. They change nitrogen into forms usable by plants.
Explanation:
They change nitrogen into nitrous oxide and ammonia, a form usable by plants.
Hope this helps ;)❤❤❤
Imagine a cell with a semi-permeable membrane that is selective to K+ ions only. The internal solution contains 100 mM KCl and the external solution contains 1 mM KCl. What equation would you use to determine the potential (EK) developed across the membrane?
A. Ion equation
B. Molarity equation
C. Nernst equation
D. Goldman equation
Answer:
C. Nernst equation
Explanation:
The Nernst Equation is used to find the equilibrium potential of an ion.
It tells you only what the equilibrium potential for an individual ion is, not what the summed effect of all ions is on the membrane potential.
The formula for Nernst Equation is:
[tex]E_{ion}[/tex] = [tex]\frac{RT}{FZ}[/tex] In [tex]\frac{[ion]_{out} }{[ion]_{in} }[/tex]
where F is Faraday Constant, R = gas constant, 8.314 J/mol K
, T = temperature, in K, Z stoichiometric number of electrons in the reaction, is the Reduction Potential in V.
Kindly note that, if we have a squid giant axon at rest with normal intracellular and extracellular ion concentrations. If the membrane permeability to K+ ions is increased, the K+ equilibrium potential (Nernst potential) will stay the same.
The phi phenomenon demonstrates that illusions can be influenced by __________.
perceptions of movement
Decomposers are an important part of the
ecosystem because
A. they return moisture to the soil
B. they return needed nutrients to the soil
C. they help spread plant seeds
Answer:
the answer correct answer would be B. :)
Explanation:
Without decomposers, dead leaves, dead insects, and dead animals would pile up everywhere. ... Thanks to decomposers, nutrients get added back to the soil or water, so the producers can use them to grow and reproduce. Most decomposers are microscopic organisms, including protozoa and bacteria. (credits to google for explanation)
The Decomposers are an important part of the ecosystem because they return needed nutrients to the soil. The correct option is (B).
By dissolving organic materials, such as dead plants and animals, into simpler molecules, decomposers perform a key function in ecosystems. They return nutrients to the soil by breaking down organic matter. The growth and development of plants depend on minerals like nitrogen, phosphorus, and potassium, which are vital to their growth. Decomposers help the ecosystem's fertility and the overall health of the food chain by recycling these nutrients back into the soil.
They decompose organic materials to replenish nutrients in the soil. Plants require certain elements, such as potassium, phosphorus, and nitrogen, for proper growth and development. By recycling these nutrients back into the soil, decomposers contribute to the ecosystem's fertility and the general well-being of the food chain.
Hence, the Decomposers are an important part of the ecosystem because they return needed nutrients to the soil. The correct option is (B).
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In the reaction 6CO2 + 6H2O → C6H12O6 + 6O2 carbon dioxide is one of the
a. products.
b. reactants.
c. catalysts.
d. enzymes.
e. elements.
Answer:
B. Reactants.
Explanation:
In every chemical equation, the reactants are on the Left.
Carbon dioxide acts as a reactant that combine with water and produces glucose during photosynthesis. Thus, option b is correct.
What is photosynthesis?Photosynthesis is the biochemical event in which the plants produce their food as well as the food for all other organisms by capturing sunlight.
In photosynthesis, carbon dioxide and water from the atmosphere combine to produce carbohydrate, oxygen and energy. Photosynthesis converts light energy to chemical energy through carbon fixation.
Photosynthesis is performed by all the green plants and certain bacteria. As green plants contain chlorophyll, it is the main centre for absorption of sunlight. Splitting of water produces electrons, which are then used for energy production through electron transport chain.
Thus, photosynthesis is important for releasing oxygen into the atmosphere and regulating the amount of carbon dioxide on earth.
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The question is above
Hello there! :D
Yes, biology! Love getting some cool science questions. :)
Let's start by reviewing the context of the question:
We know that all living things grow, and that multicellular and unicellular organisms do so in different ways.
How do multicellular organisms grow?
We go through a process called Mitosis for Somatic (body cells), and Meiosis for Gametes (ovum and sperm). We do this to grow and to procreate. Humans are multicellular, so is your dog, Barry B. Benson, and all the beautiful flowers and trees that you see outside in the spring time.
Second question, ya like jazz? Nah, haha. How do unicellular organisms grow?
They grow through expansion! Their only cell grows until it reaches maturity and it begins to split (divide) to form more unicellular organisms. An example of a unicellular organism that does this is yeast, which is in most bread.
Now that we have our context, we can answer this question. What is the topic we talked about this most in covering context? Cell divison!
The answer choice that covers this topic the best is answer "A".
I hope this helps you and you have a wonderful day,
Kai xx
5. Do all trees lose their leaves in winter? Explain.
6. Describe how the weather affects fall color intensities.
Help pleasee!!
explain the relationship between structure and function
Answer:
structure are the physical things or how a substance looks like while function is what they possesses
What is created through the process of uplift?
Answer:moutains
Explanation:when two sides of the earth push together it forms moutains
Answer:
Uplift is the process by which the earth's surface slowly rises either due to increasing upward force applied from below or decreasing downward force from above. During uplift, land, as well as the sea floor, rises. The outer shell of the earth, the crust, divides into moving sections called plates.
aerobic respiration produces glucose true or false
Answer:
TRUE
Explanation:
Aerobic respiration produces glucose
Answer: False.
Explanation: