Unit 4 Bio

Question 1

What are the three parts of a nucleotide

Answer 1

Nitrogenous base
Deoxyrybose sugar
Phosphate

Question 2

4 nitrogen bases

Answer 2

Adenine and thymine
Guanine and cytosine

Question 3

What parts of nucleotides make up the rings of the ladder dna model

Answer 3

Bases

Question 4

What parts of nucleotides make up the sides of the ladder dna model

Answer 4

Sugar and phosphate molecules

Question 5

How many hydrogen bonds connect a to t

Answer 5

2

Question 6

How many hydrogen bonds connect g to c

Answer 6

3

Question 7

What type of molecule is a dna helix ase

Answer 7

Enzyme

Question 8

What do helicases do

Answer 8

Untwist and separates double helix and the two dna strands

Question 9

Semi conservative replication

Answer 9

Original dna molecules conserve the information from one half of the original molecule

Question 10

What refers to loose dna inside nucleus

Answer 10

Chromatin

Question 11

What part of cell cycle is dna replicated

Answer 11

S phase

Question 12

What part of cell cycle is dna condensed into chromosomes

Answer 12

G1