Genes/DNA

Question 1

Which of the following are components of nucleotides?

(a) deoxyribose
(b) amino acids
(c) phosphate
(d) enzymes (e) nitrogenous bases

Answer 1

Deoxyribose and phosphate

Question 2

Which of the following represent a correct pairing of bases?

(a) adenine with thymine
(b) adenine with guanine
(c) thymine with adenine
(d) guanine with cytosine
(e) thymine with thymine

Answer 2

A,C,D

Question 3

The building blocks of DNA are:

Answer 3

Nucleotides

Question 4

Which of the following are nitrogenous bases?

(a) Valine
(b) Guanine
(c) Thymine
(d) Serine

Answer 4

B,C

Question 5

Replication of DNA occurs

(a) During cell division
(b) before cell division
(c) at any time

Answer 5

B

Question 6

A nucleotide triplet codes for

(a) a protein
(b) an amino acid
(c) an enzyme
(d) an organic base

Answer 6

A

Question 7

The sequence of bases in DNA forms the

Answer 7

Genetic code

Question 8

A group of three bases (_________) controls the production of a particular amino acid in the cytoplasm of the cell

Answer 8

A triplet

Question 9

Such a sequence forms a

Answer 9

Gene

Question 10

There may be a _________ or more bases in one gene

Answer 10

Thousands

Question 11

Cytosine
Adenine
Thymine=

Answer 11

Valine

Question 12

Cytosine
Guanine
Adenine=

Answer 12

Alanine

Question 13

Each triplet codes for a specific _______

Answer 13

Amino acid

Question 14

The sub-units are called

Answer 14

Nucleotides

Question 15

Each nucleotide is made up of

a sugar called

Answer 15

Deoxyribose

Question 16

is a sugar, like glucose, but with only five carbon atoms in its molecule

Answer 16

Ribose

Question 17

is almost the same but lacks one

oxygen atom

Answer 17

Deoxyribose

Question 18

Both molecules may be represented by the symbol

Answer 18

Pentagon

Question 19

The most common bases are

Answer 19

Adenine

Thymine

Guanine

Cytosine

Question 20

The deoxyribose, phosphate and one of the bases

Combine to form a

Answer 20

Nucleotide

Question 21

When does DNA strands unwind and separate

Answer 21

Before cell division

Question 22

Each strand makes a new partner by adding the appropriate

Answer 22

Nucleotides

Question 23

The result is that there are now ________ DNA molecules in the nucleus

Answer 23

Two

Question 24

Before a cell divides, the DNA strands unwind and separate Each strand makes a new partner by adding the appropriate nucleotides The result is that there are now two double-stranded DNA molecules in the nucleus So that when the cell divides, each nucleus contains identical DNA

This process is called

Answer 24

Replication

Question 25

The sequence of bases in DNA forms the

Answer 25

Genetic code

Question 26

CGA=

Answer 26

Alanine

Question 27

CAA=

Answer 27

Valine

Question 28

DNA is a what

Answer 28

Chemical substance

Question 29

DNA controls all the

Answer 29

Chemical changes

Question 30

The kind of cell which is formed, (muscle, blood, nerve etc) is controlled by ____

Answer 30

DNA

Question 31

The kind of organism which is produced (buttercup,

giraffe, herring, human etc) is controlled by ______

Answer 31

DNA

Question 32

is a very large molecule made up of a long chain of sub-units

Answer 32

DNA