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DNA synthesis

Total questions: 16

Worksheet time: 13mins

Name
Class
Date
1.

how many hydrogen bonds are between adenine and thymine?

a)

three hydrogen bonds

b)

two hydrogen bonds

c)

one hydrogen bond

2.

True or False. The strands of DNA are complementary which means they are identical and have the same message

a)

True

b)

False

3.

-------- is the material that makes up a chromosome

(a)  

4.

Which of the following statements is incorrect regarding histone proteins?

a)

they are acidic proteins

b)

they are the most abundant chromatin protein

c)

they promote DNA packaging into chromatin fibers

d)

there are two types of histones; core and linker

5.

What would be the other side of this strand of DNA?

  3- AATCATGGA -5

a)

5- AATCATGGA-3

b)

5- TTAGTACCT- 3

c)

5- AGGTACTAA-3

6.

The picture below shows an enzyme unwinding and unzipping DNA.

​

​What is the name of this enzyme?

a)

DNA Helicase

b)

DNA Ligase

c)

DNA polyermase

d)

RNA Polymerase

7.

Which is the role of DNA polymerase?

a)

Unwinds the original DNA strand

b)

Lays down RNA primer for new nucleotide bases.

c)

Builds new strands by bringing in new nucleotide bases.

d)

Remove Okazaki fragments for new nucleotides.

8.
The process of DNA replication is called semi conservative because it results in
a)
none of these
b)
Two DNA molecules.  One original molecule and one with two new strands
c)
two exact copies with new strands
d)
two identical molecules, each with 1 original strand and one new.
9.
Why would it be important to replicate DNA before a cell divides in mitosis or meiosis?
a)
In order for genetic information to be transferred into daughter cells.
b)
In order for the cell to be able to increase in size.
c)
In order for the DNA to be contained in the nucleus.
d)
In order for the cell to re-order the DNA sequencing in the new cells.
10.

Human cells contain which of the following? more than one answer

a)

23 pairs of chromosomes

b)

46 chromosomes

c)

23 chromosomes

d)

46 genes

11.

Which letter in the picture below depicts the leading strand in DNA replication?

a)

A

b)

C

c)

B

d)

None of the above

12.
What strand is copied faster?
a)
Leading
b)
Lagging
13.

What is the charge of a DNA molecule?

a)

Positive because of the purine bases

b)

Negative because of the phosphate groups

c)

Positive because deoxyribose has a positive charge

d)

Negative because of the hydrogen bonds

14.

What's the difference between purine and pyrimidine nitrogen bases?

a)

Pyrimidines are only found in DNA, not RNA

b)

Pyrimidines have two rings, Purines have one

c)

Purines are only found in DNA, not RNA

d)

Purines have two rings, Pyrimidines have one

15.

Arrange the correct order of enzymes involved in DNA replication from beginning to end

a)

DNA helicase

b)

DNA primase

c)

DNA polymerase

d)

DNA ligase

1)
2)
3)
4)
16.

What is the purpose of telomeres?

a)

They protect genes

b)

They unwind the DNA during replication

c)

They prevent shortening of DNA

d)

They allow DNA to be packaged into the nucleus

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