If one strand of DNA is CAGGTTACG, the opposite strand isa. GTCCAATGC.
b. GTCCTTAGC.
c. CAGGTTACG.
d. GTCCTTACG.

Answer:

the lock and key model.

Explanation:

The reason why this model for enzymes is called as lock and key model is because like a specific key fits into a particular lock meant for only that key, in a similar way a substrate also fits in an enzyme active site which is specifically meant for that particular substrate only.

Enzymes are very specific for their substrates and only a substrate which has a particular shape corresponding to the active site of that enzyme can get inside the enzyme for catalysis.

This model is extremely useful for blocking enzymatic activities. In order to block the enzyme we can use a structural analogue of that enzyme which rather than getting converted into products inhibits the enzyme and restricts its activity.

For example: Cholesterol biosynthesis can be restricted easily by using statin drugs which are structural analogues of HMG CoA. Statins bind HMG CoA reductase and stop its structural analogue which is HMG CoA from binding this enzyme. By doing this HMG CoA is not converted into mevalonate and hence cholesterol biosynthesis is halted.

Answer:

the lock and key model is the answer

Explanation:

Enzyme has a pre-determined shape for the active site

Only substrate of specific shape can bind with active site

Substrate contact with enzyme will change the shape of the active site

Allows small change in space to accommodate substrate

Genetic variation is brought about by mutation, genetic recombination, and gene flow in a population. Therefore, option (C) is correct.

What is genetic variation?

The differences in DNA sequences that exist between individuals within the same group are referred to as genetic variation. Both germ cells, which include sperm and eggs, and somatic cells, which include all other types of cells, are subject to variation.

One source of genetic variation is mutations, which can be defined as any alteration in the sequence of genes found in DNA. Gene flow, which can be defined as the movement of genes across various groups of organisms, is still another source. The final cause of genetic diversity is sexual reproduction, which results in the formation of new gene combinations and can be a consequence of sexual reproduction.

Learn more about genetic variation, here:

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Answer:

genetic variation

Explanation:

I took the test

Ans.

Symmetry in animals can be defined as the balanced distribution of identical body shapes or parts within an organism's body. All animals, except sponges have either radical or asymmetry.

Sponges belong to phylum Porifera, which exhibit asymmetrical body plans.  Their body shapes are adapted for maximum efficiency of water flow through their central cavity.

Thus, the correct word to be filled in the blank is 'sponges.'

Answer:

It is a C4 plant 100% sure

hope i helped

-lvr