How many amino acids are coded for by DNA

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Answer 1

Answer: Hi There! :)

How many amino acids are coded for by DNA

You can think of the sequences of bases in the coding strand of DNA or in messenger RNA as coded instructions for building protein chains out of amino acids. There are 20 amino acids used in making proteins, but only four different bases to be used to code for them. Obviously one base can't code for one amino acid.

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In an experiment, the hypothesis is If the wavelength of the light shining on a plant is shortened, the rate of photosynthesis is slowed down. This hypothesis is _____.testablefalsifiableboth of the abovenone of the above
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Cells can contain thousands of different genes; however there is often only a small percentage of these genes that are being expressed at any given time. this indicates that - a. cells are unable to express all genesb. gene expression is regulatedc: the expression of genes is randomd unused genes are removed from the dna

Answers

Answer:

b. gene expression is regulated

Explanation:

Several mechanisms exist in the cell which regulate the turning on or turning off of certain genes.

These mechanisms are collectively referred to as gene regulation. The regulation can occur in several ways, including;

Structural and chemical changes to genetic materials in the cell.
Regulation of transcription process.
Regulation of mRNA translation or protein synthesis

The correct option is b.

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How can i put punnett square in to a sentence?

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I enjoyed learning about punnet square in school.

Sally did not know how to use a punnett square, so I taught her how to use it.

A weakened immune system may be caused by what?

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I think the best answer is that there is a virus in the body.

smoking and taking drugs allows the immune system to get weak

Which type of selection leads to increased phenotypic and genetic variation? directional selection disruptive selection stabilizing selection species selection

Answers

The circumstance that concludes whether the organism will be able to accommodate and endure in the changed conditions is called selection.

The correct answer is:

Option B. Disruptive selection.

This can be explained by:

Disruptive or diversifying adaptation occurs when there is a change in population genetics in which the traits are valued over intermediates.

This type of assortment supports either the dominant or the recessive trait but do not favour intermediates.

For example, in selection between tall, short or intermediate organisms the tall and short will be selected over the medium heightened organism.

Therefore, disruptive selection will lead to increased phenotypic and genetic variation.

To learn more about disruptive selection follow the link:

brainly.com/question/11890523

Answer:

diruptive selection/ diversifying selection

Explanation:

disruptive selection often leads to more variations in species

Check all the statements that are true in regards to the carbon cycle

Answers

Answer: this are no options on this question.Here are some facts about the carbon cycle-

It involves the circulation of the element carbon

It ensures that the element is constantly being reused.

Explanation:in nature, nutrients move through the biosphere.it involves movement from the environment eg the air,soil etc, to the organism in a cyclic matter.this cyclic movement ensures that the nutrients are not exhausted and are continually reused.examples of nutrients that undergoes such cycles are carbon, nitrogen etc.

Water too had it's cycle in nature.

In The carbon cycle, carbon dioxide is taken up by autotrophs to produce carbonhydrate. Then heterotrophs takes up the carbonhydrate found in plant .then carbon dioxide is given off and the plants takes up this carbon dioxide for photosynthesis and the process continues.

Carbon can be also returned to the atmosphere by combustion of wood and coal .

Not all members of a species are the same. Every species exhibits ? ? like eye color, are passed from parent to offspring.

Answers

Not all members of a species are the same. Every species exhibits variations in different traits like eye color, that are passed from parent to offspring.

This statement is paraphrased from the Darwins's theory. Darwin's theory suggested that there are variations among individuals in a population and that these variations will help individuals to survive. Natural selection is the differences in survival and reproduction as the consequence of differences in phenotypes.

Answer:

variation and traits, genes

Explanation:

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