hyaor 1. Pease nicate the number of following chemical structures ard ?? sugars,

Question

hyaor 1. Pease nicate the number of following chemical structures ard ?? sugars, nitrogenous bases and hydrogen bonds) present in the DNA molecule duplex shown below. S-CGGAGATTCAGGTACGCTTTTAAAGC-3 ?'CATGCG-S. 2- hydroxyl: 3-hydroxyls: Ribose sugars:Nitrogenous bases: Hydrogen bonds A) 32 A) 32 B) 30 C) 28 A) 32 B) 30 C) 28 D) 16 E) 4 F) 2 G) O A) 32 B) 30 C) 28 D) 16 E) 4 F) 2 G) O A) 32 B) 30 C) 28 D) 16 E) 4 F) 2 G) 0 B) 30 C) 28 D) 16 E) 4 F)2 D) 16 E) 4 F) 2 G) o G) o What enzyme you would need to extend the short stretch of nucleotides shown as the lower strand? Writ the sequence of the newly synthesized fragment and label its 5' and 3 ends. 2. If the polymerase double every 24 hours? average human chromosome contains roughly 150 million base pairs, and DNA can synthesize new DNA at approximately 50 bases per second, how can human c 3. Which of the following would NOT necessarily be true for a DNA molecule? A) A = T D) A + T-G-C

Explanation / Answer

Ans1

Enzyme used to extend the short stretch of DNA= DNA polymerase

The sequence of newly formed fragment:

3'-GCCTCTAAGTCCATGCCGAAAATTTCG-5'

Ans3:

According to chargaff rule,

A=T,

G=C

Also, A+G=T+C

Or A+C=G+T

But A+T is not always equal to G+C.

(D) A+T=G+C

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