Answer to Question #171518 in Biology for Sara

Question

which of the following is true?

A) DNA is transcribed into mRNA in the cytoplasm

B) both RNA and DNA are doubled stranded

C) some mutations occur during DNA replication may be harmful

D) during DNA replication the new strand of DNA is synthesized by DNA helicases

c?

Determine the anticodon of the tRNA that carries the third amino acid, given the following strand TACCGATAATTC:

A). AUU

B). ATT

C). UAA

D). AUG

D?

writing an exam just want to know if this is right.

The DNA of the organism Z is made of 20% thymine bases, what percentage of its bases is guanine?

a) 20%

b) 30%

c) 40%

d) 60%

a or c?

100-20=80/2=40

or 60-20=40/2=20

so which one is it? please let me know if my answers are correct as i have stated already that i am wiring a test right now. thanks.

Answer 1

1. C) some mutations occur during DNA replication may be harmful

2. A). AUU

Third codon is TAA. As a result, the anticodon is AUU.

3. B) 30%

%T = %A = 20%

100 % - 20%(T) - 20%(A) = 60%

%G = %C = 60% / 2 = 30%