Question

10.Which base pairing is incorrect for DNA replication (not protein synthesis)

a. A-T

B. T-A

C. G-C

D. U-T

12.Cancer results from unchecked

a. Mitosis

b. Meiosis

c. Homeostasis

d. Complementarity

22. Which of the following is true about aerobic cellular respiration?

a. it occurs in both plant and animal cells

b. It is a catabolic reaction

c. Sugar ( in the presence of oxygen) is broken down into carbon dioxide and water, releasing energy.

d. all of the above is true.

31. Which of the follwoing is true about the amino acid code?

a. the code is nearly universal

b. the code is redundant

c. the code had no redundancy

d. both a and b

32. what is the function of an operon?

a. promotes the expression of a gene

b. codes for the production of proteins

c. allows binding of suppressor proteins

d. none of the above

Answer 1

10 . Option D is the correct answer

U-T can't be possible in DNA replication.

Uracil is seen in RNA as a subject to thymine.

Uracil is not present in DNA replication.

So U-T base pairing is not present in DNA replication.

12. Option a is correct answer

Mitosis

Cancer is the result of unchecked mitosis or cell division . It is caused by loss of regulation of cell division. The check points become nonfunctional and produce tumourous cells.

22. Option d is the correct answer

All the statement are correct

aerobic cellular respiration is

it occurs in both plant and animal cells

It is a catabolic reaction

Sugar ( in the presence of oxygen) is broken down into carbon dioxide and water, releasing energy.

31. Option d is the correct answer

Both a and b are true

The genetic code is redundant or degenerate that is one amino acid is coded by more than one codon. The genetic code is universal that is it is same in nearly all organisms.

32.option a is correct answer

Operon help in expression of gene.

Operon is the functioning unit of DNA that is controlled by the promoter.operon help in transcription regulation.operons act as binding sites for regulatory proteins which regulates transcription of genetic material.

Example lac operon