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DNA and RNA-CSHR 1001

Total questions: 19

Worksheet time: 10mins

Name
Class
Date
1.

Match the appropriate nitrogenous base pairs in DNA

a)

A-U

C-G

b)

A-G

C-T

c)

A-T

C-G

d)

A-U

C-T

2.

What is the complementary strand for the DNA sequence AACC?

4 lines
3.

Match the appropriate nitrogenous bases to their kind (purine/pyrimidine)

a)

purines: C, U, T

pyrimidines: A, G

b)

purines: A, T

pyrimidines: C, U, G

c)

purines: A, U

pyrimidines: G, C, T

d)

purines: A, G

pyrimidines: C, U, T

4.

The new DNA strand that grows continuously in the 5' to 3' direction is called the _____________

a)

Leading strand

b)

Lagging Strand

5.

What protects genetic information contained at the ends of eukaryotic chromosomes?

a)

DNA pol I

b)

Histones

c)

Telomeres

d)

DNA ligase

6.

Which bond links two nucleotides together?

a)

phosphodiester bond

b)

hydrogen bond

c)

covalent bond

d)

ionic bond

7.

What is the directionality of DNA?

a)

DNA/RNA is synthesized in the 5' to 3' direction

b)

DNA/RNA is synthesized in the 3' to 5' direction

8.

Nitrogenous Bases are joined by which type of bond

a)

Phosphodiester Bonds

b)

Polar Bonds

c)

Ionic Bonds

d)

Hydrogen Bonds

9.

Match the proteins involved in initiating replication:

(1) synthesizes a short, temporary RNA primer on each DNA strand

(2) recognizes RNA primer and adds nucleotides to the 3' OH end of nucleotide (also proof reads and repairs any mistakes)

(3) replaces RNA primers with corresponding nucleotides

(4) seals gaps between Okazaki fragments

a)

(1) DNA primase

(2) DNA polymerase III

(3) DNA polymerase I

(4) DNA ligase

b)

(1) DNA primase

(2) DNA polymerase I

(3) DNA polymerase III

(4) DNA ligase

c)

(1) DNA ligase

(2) DNA polymerase I

(3) DNA polymerase III

(4) DNA primase

d)

(1) DNA ligase

(2) DNA polymerase III

(3) DNA polymerase I

(4) DNA primase

10.

How do cells make new copies of their DNA?

a)

semi-conservative replication

b)

conservative replication

c)

dispersive replication

11.

Which protein binds to the replication fork and continues to break hydrogen bonds between 2 strands?

a)

topoisomerase

b)

DNA helicase

c)

DNA polymerase III

d)

DNA ligase

12.

Which letter in the picture represents Okazaki fragments

a)

A-lagging strand

b)

B lagging strand

c)

C-replication fork

d)

C-leading strand.

13.

Match the proteins involved in preparing for DNA replication:

(1) breaks hydrogen bonds between DNA strands

(2) prevent separated strands from rejoining

(3) relieves torsional strain on the double helix as it unravels

a)

(1) DNA helicase

(2) topoisomerase

(3) SSB proteins

b)

(1) DNA helicase

(2) SSB proteins

(3) topoisomerase

c)

(1) SSB proteins

(2) topoisomerase

(3) DNA helicase

d)

(1) topoisomerase

(2) DNA helicase

(3) SSB proteins

14.

Which strand is copied faster

a)

Leading

b)

Lagging

15.

Problem: DNA polymerase III cannot add to the final sequence of DNA to the 5' end of the lagging strand. What's the solution? (1 word)

(a)  

16.

Charge of the DNA molecule

a)

Negative

b)

Positive

17.

Prokaryotic RNA replication occurs through multiple replication orgins

a)

True

b)

False

18.

A molecule of DNA contains all of the following except

a)

Nitrogenous Bases

b)

Sugar

c)

Sulfur

d)

Phosphate

19.

Which of these bases do not exists in RNA

a)

A

b)

T

c)

G

d)

U