Question

STUDENT OR OTHERWISE). 1. IfAvery, MacLcod, and McCarty had determined that the transforming molecule was aRNA, what experimental results would have been observed? (0.5 point) a. Heat-killed cultures treated with DNase would not have transformed the R cells. b. Heat-killed cultures treated with c. Heat-killed cultures treated with RNase would not have transformed the R cells d. Heat-killed cultures treated with RNase would have transformed with R cells. protease would not have transformed the R cells. 2. Provide the name of the molecule shown below. (0.5 point) b. uridinc monophosphate 3. Given the following sequence 5 - TGT -3', the notation 3' refers to what, specifically? (0.5 point) a. A free hydroxyl group on dcoxyribosc at position 3 on the ring b. A free hydroxyl group on thymine at position 3 on the ring c. A free phosphate group on dcoxyibosc at position 3 on the ring d. A free phosphate group on thymine at position 3 on the ring e. Position 3 of thymine is attached to the sugar of the nucleotide 4. A DNA sequence has on one sequence ATTAGACA. How many hydrogen bonds would form between this sequence and its complementary strand in a double helix? (0.5 point) a. 8 b. 16 c. 18 d. 22 e. 24

Answer 1

1. Answer: c

If the heat killed cultures were treated with RNase they would not transform R cells if RNA was the transforming molecule. This is because the RNase would denature RNA and it would not function and hence would not transform rough strain to the smooth strain.

2. Answer: e

Deoxythymidine mono phosphate consists of a phosphate group, the pentose sugar deoxyribose, and the nucleobase thymine.

3. Answer: a

The 3′-end of strand (T) terminating at the hydroxyl group of the third carbon in the sugar-ring,

4. Answer: c

ATTAGACA . A forms double bond with T and G three bonds with C. Hence 18 hydrogen bonds

5. Answer: e

A DNA with 560 nucleotides would have 58 turns since each turn has 10 nucleotide pairs and 190 nm in length because each turn is 3.4nm in length hence 56 turns would be 190nm