Prelim

Question 1

Structure of DNA
A means

Answer 1

Adenine

Question 2

Structure of DNA
T means

Answer 2

Thymine

Question 3

Structure of DNA
C means

Answer 3

Cytosine

Question 4

Structure of DNA
G means

Answer 4

Guanine

Question 5

What are the 4 nitrogen containing bases

Answer 5

(A) Adenine
(G) Guanine
(T) Thymine
(C) Cytosine

Question 6

Who elucidated the molecular structure of DNA and in what year

Answer 6

James Watson and Francis Crick (1953)

Question 7

What does James Watson and Francis Crick used in 1953

Answer 7

X-RAY DIFFRACTION DATA

Question 8

Who collected the xray diffraction data

Answer 8

Rosalinda Franklin and Maurice Wilkins

Question 9

What does Watson and Crick propose

Answer 9

Double Helix

Question 10

A twisted,spiral ladder consisting of two chains wound around each other and held together by hydrogen bonds

Answer 10

Double Helix

Question 11

DNA composed of composed units which is called

Answer 11

Nucleotides

Question 12

Purine with a double ring structure

Answer 12

Guanin

Question 13

Smaller pyrimidine molecules with a single ring structure

Answer 13

Cytosine and Thymine

Question 14

Who performed the Biochemical analyses

Answer 14

Erwin Chargaff

Question 15

______ consist of two sister chromatids, each of which is comprised of a contracted and compacted Double Helix

Answer 15

Chromosome

Question 16

In what law does the two alleles segregate randomly each other during the formation of gametes

Answer 16

FIRST LAW: Principles of Segregation

Question 17

The synthesis of a new molecule of DNA is called

Answer 17

Replication

Question 18

What us the 3 general categories that the DNA classified

Answer 18

Unique Sequence
Highly repetitive sequence DNA
Middle repetitive sequence DNA

Question 19

Is a construction visible on metaphase chromosome where the two sister chromatids are joined together

Answer 19

Centromere