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Unit 3: Lesson 3 - DNA and RNA

Total questions: 20

Worksheet time: 14mins

Name
Class
Date
1.

What makes up the SIDES of a DNA ladder?

a)

nitrogen bases

b)

sugars & phosphates

c)

genes & chromosomes

d)

RNA

2.

What makes up the rungs (steps) of a DNA ladder?

a)

sugars & phosphates

b)

nitrogen bases

c)

sugars

d)

genes & chromosomes

3.
Which of the following best describes a DNA molecule?
a)

double helix

b)

contains ribose

c)

made of amino acids

d)

contains Uracil

4.
Nitrogenous bases are joined by which type of bond?
a)

polar bonds

b)

ionic bonds

c)

covalent bonds

d)

hydrogen bonds

5.
What are the three components of a nucleotide?
a)

sugar, hydrogen, nitrogen base

b)

sugar, oxygen, nitrogen base

c)

sugar, phosphate, nitrogen base

d)

sugar, phosphate, protein

6.
Cytosine always pairs with
a)

Adenine

b)

Thymine

c)

Uracil

d)

Guanine

7.

What is the complement to the DNA strand below:
5'-ATGCCAT-3'

(a)  

8.
What is the significance of the sequence (order) of the Nitrogen Bases in DNA?
a)

The order of the Nitrogen Bases determines the number of chromosomes present in an organism.

b)

The order of the Nitrogen Bases determines the traits that an organism will possess (have).

c)

The order of the Nitrogen Bases determines the gender of an organism.

d)

The order of the Nitrogen Bases determines whether an organism is abiotic biotic.

9.
Assume that you have straight hair and your sibling has curly hair. What accounts for this difference?
a)

You have DNA and your sibling does not.

b)

Your sequence of nitrogen bases is different than your sibling.

c)

Your sibling has a weave. 

d)

Your sibling has a genetic mutation. 

10.
Why is DNA important?
a)

it is very small and very complicated

b)

it's in everything

c)

it serves as the blueprint for traits of all living things

d)

because we eat it every day for energy

11.
What are the 4 nitrogen bases?
a)

adenine, thymine, cytoplasm, and guanine

b)

adenine, thymine cytosine, and guanine

c)

adenine, thymine, cytosine, and gylcerol

d)

adenine, thymine, cytosine, and glucose

12.
Which organelle is DNA usually found in?
a)

cell membrane

b)

vacuole

c)

chloroplast

d)

nucleus

13.

What is a section of DNA that codes for a specific protein called?

a)

RNA

b)

replication

c)

gene

d)

protein

14.

What does DNA stand for?

a)

Deoxyribonucleic acid

b)

Diribose nutride acidosis

c)

Dinitro acid

d)

Deoxynitrogenic acid

15.

If 23% of the nitrogenous bases in a DNA molecule are guanine, what percentage of the nitrogenous bases will be adenine?

a)

27%

b)

23%

c)

46%

d)

54%

16.
What is the difference between the sugars found in DNA and RNA?
a)

RNA contains glucose

b)

RNA contains sucrose

c)

RNA contains deoxyribose

d)

RNA contains Ribose

17.
What is the difference between DNA and RNA in terms of bases?
a)

RNA contains uracil in place of thymine

b)

RNA contains uracil in place of adenine

c)

RNA contains uracil in place of guanine

d)

RNA contains uracil in place of  cytosine

18.
RNA has how many strands?
a)

one

b)

two

19.
DNA and RNA belong to the biomolecule class of 
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
20.
Which of the following is not a difference in DNA and RNA?
a)
DNA uses Deoxyribose and RNA uses Ribose
b)
DNA is double stranded and RNA is single stranded
c)
DNA uses Uracil and RNA uses Thymine
d)
DNA uses Thymine and RNA uses Uracil