quiz 1

Question 1

What is the key differece between ‘rough’ and ‘smooth’ S. Pneumonaie

A) smooth bacteria can evade the immune system of a mouse
B) Rough bacteria have more genes than smooth bacteria
C) Smooth bacteria have more genes than rough bacteria
D) Rough bacteria are able to synthesize a polysaccharide capsule

Answer 1

A) smooth bacteria can evade the immune system of a mouse

Question 2

Why was the DNAase treatment in the Avery experiments an important step

Answer 2

this allowed them to demonstrate that removing the DNA prevents transformation

Question 3

If you know the percentage of A within a double stranded virus, then which of the following is incorrect?

A) you can figure out the ratios of each of the RNA nucleotides
B) The amount of T will be identical to A
C) It will form a right handed helix
D) Ribose will be used in the nucleotides

Answer 3

A) the amount of T will be identical to A

there is no Thymine in RNA

Question 4

When E.coli compacts its genome, the first level of compaction will be DNA wrapping around histones

True or false

Answer 4

false, the first level is the formation of loop domains

Question 5

The backbones of the two DNA strands in a double helix are composed in opposite directions and we refer to this relationship as complementarity

true or false

Answer 5

false, this refers to antiparallel features

Question 6

The highest level of chromatin compaction in a eukaryotic chromosome during metaphase of mitosis is:

A) Nucleosome
B) Condensin
C) 30 nm fiber
D) Euchromatin
E) Radial Loops

Answer 6

since this is mitosis, it is condensin
the highest possible level of compaction is cohesion