A Guide to the Human Genome (1)

Question 1

Both ______ factors and ________ factors can affect disease.

Answer 1

Environmental

Genetic

Question 2

Strands of DNA pair up in an _________ fashion

Answer 2

Antiparallel

Question 3

DNA is replicated and read always in the ___ -> ___ direction

Answer 3

5’

3’

Question 4

The 4 bases in DNA are

Answer 4

A
T
G
C

Question 5

The 4 bases in RNA are

Answer 5

A
U (uracil)
G
C

Question 6

The sugar backbone is called

Answer 6

2-deoxyribose

Question 7

How many H bonds are there between Adenine and Thymine?

Answer 7

2

Question 8

How many H bonds are there between Cytosine and Guanine?

Answer 8

3

Question 9

How many chromosomes is normal in humans?

Answer 9

22 pairs and 2 sex chromosomes
23 pairs
46 chromosomes

Question 10

DNA associates with _______ and is wound into a structure called a ______

Answer 10

proteins

chromosome

Question 11

DNA replications occurs in what stage of the cell cycle

Answer 11

S phase

Question 12

Define Mitosis

Answer 12

When one diploid parent cell becomes two identical diploid daughter cells

Question 13

Define Meiosis

Answer 13

When one diploid parent cell becomes 4 haploid daughter cells (occurs in gamete formation)

Question 14

How does RNA differ from DNA

Answer 14

RNA is:

• single stranded
• ribose backbone (not deoxyribose)
• uracil (U) is used instead of thymine (T)

Question 15

What parts of genes contain genetic information

Answer 15

Exons