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Chapter 14 & 15 Practice

Total questions: 27

Worksheet time: 20mins

Name
Class
Date
1.

The scientists who demonstrated that DNA replication is semiconservative

a)

Watson and Crick

b)

Meselson and Stahl

c)

Hershey and Chase

d)

Avery, MacLeod, and McCarty

e)

Franklin and Wilkins

2.

Label the structures and carbons of the DNA nucleotide

a)

2'

b)

3'

c)

4'

d)

5'

e)

Phosphate group

f)

Nitrogenous base

g)

Pentose sugar

h)

1'

1
2
3
4
5
6
7
8
1)
2)
3)
4)
5)
6)
7)
8)
3.

In double-stranded DNA, adenine is joined to thymine and cytosine is joined to guanine by

(a)  

4.

Which of the following base pairs is/are correct?

a)

A - T

b)

C - A

c)

G - C

d)

T - A

e)

T - C

5.

The 3' end of one DNA fragment is linked to the 5' end of another fragment by means of

a)

DNA ligase

b)

helicase enzymes

c)

hydrogen bonds

d)

complementary base pairing

e)

topoisomerase

6.

The direction of synthesis of DNA is

a)

5' → 3'

b)

3' → 5'

c)

3' → 3'

d)

5' → 5'

e)

variable

7.

The genetic code is carried in the

a)

DNA backbone

b)

sequence of bases

c)

Okazaki fragments

d)

histones

e)

arrangement of 5',3' phosphodiester bonds

8.

Chargaff's rules state or infer that

a)

[A] = [T]

b)

[G] = [C]

c)

ratio of T to A = 1

d)

ratio of G to C = 1

9.

Deoxyribose and phosphate are joined in the DNA backbone by

a)

one of four bases

b)

purines

c)

pyrimidines

d)

phosphodiester bonds

e)

the 1' carbon of sugar

10.

The covalent bonds that join amino acids together are known as​​ (a)  

Choose from the below words
hydrogen bonds
peptide bonds
carbon bonds
amino bonds
11.

Match the following

a)

Transcription

1.

The making of mRNA from a DNA template.

b)

Uracil

2.

A pyrimidine found in RNA.

c)

Exon

3.

In eukaryotes, the coding region of DNA.

d)

Introns

4.

Noncoding sequences within a gene.

12.

Transcription involves

a)

mRNA synthesis

b)

decoding of codons

c)

copying DNA information

d)

ADP

e)

guanosine triphosphate

13.

Which of the following is/are termination codons?

a)

UAG

b)

UUA

c)

UAA

d)

UGA

e)

GUA

14.

Initiation of protein synthesis involves

a)

the code AUG

b)

loading initiation tRNA on the large ribosomal subunit

c)

adding amino acids to a growing polypeptide chain

d)

peptidyl transferase

15.

What is the total number of codons possible?

a)

12

b)

16

c)

20

d)

46

e)

64

16.

Initiation of transcription requires

a)

a promoter sequence

b)

DNA polymerase

c)

an RNA primer

d)

a DNA primer

e)

Okazaki fragments

17.

The template DNA strand is described as being​ (a)   to the complementary RNA strand.

Choose from the below words
antiparallel
parallel
18.

What is the DNA Base sequence for the following RNA: 5' - AUUGGGCAUCUCGA - 3'

a)

5' - TAACCCGTAGAGCT - 3'

b)

5' - UAACCCGUAGAGCU - 3'

c)

3' - TAACCCGTAGAGCT - 5'

d)

3' - UAACCCGUAGAGCU - 5'

19.

The final product of DNA replication is:

a)

mRNA, tRNA, and rRNA molecules

b)

a wide variety of proteins

c)

DNA fragments

d)

two DNA molecules, each of which contains one new and one old DNA strand

e)

the enzymes needed for further processes, such as DNA polymerase

20.

If DNA replication rejoined the 2 parental strands, it would be termed:

a)

dispersive

b)

gradient

c)

semiconservative

d)

parental

e)

conservative

21.

Which of the following causes the unwinding of the DNA double helix?

a)

DNA polymerase

b)

DNA helicase

c)

RNA primer

d)

primosome

e)

RNA polymerase

22.

A replication fork:

a)

is only seen in prokaryotic chromosomes

b)

is only seen in bacterial cells

c)

is a Y-shaped structure where both DNA strands are replicated simultaneously

d)

is a site where one DNA strand serves as a template, but the other strand is not replicated

e)

is created by the action of the enzyme RNA polymerase

23.

Enzymes called​ (a)   form breaks in the DNA molecules to prevent the formation of knots in the DNA helix during replication.

Choose from the below words
topoisomerases
single-strand binding proteins
DNA polymerases
RNA polymerases
DNA ligases
24.

Which of the following adds new nucleotides to a growing DNA chain?

a)

DNA polymerase

b)

DNA helicase

c)

RNA primer

d)

primase

e)

RNA polymerase

25.

In DNA replication, the lagging strand:

a)

is synthesized as a series of Okazaki fragments

b)

is synthesized as a complementary copy of the leading strand

c)

pairs with the leading strand by complementary base pairing

d)

is made up entirely of RNA primers

e)

is not synthesized until the synthesis of the leading strand is completed

26.

Okazaki fragments are joined together by

a)

RNA polymarase

b)

DNA ligase

c)

DNA polymerase

d)

RNA ligase

e)

primase

27.

How is the chromosome of a bacterial cell replicated?

a)

The linear DNA molecule is replicated from multiple origins of replication bidirectionally.

b)

The linear DNA molecule is replicated from one origin of replication birectionally.

c)

The circular DNA molecule is replicated from multiple origins of replication bidirectionally.

d)

The circular DNA molecule is replicated from one origin of replication bidirectionally.

e)

The circular DNA molecule is replicated from one origin of replication unidirectionally.

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