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DNA Unit

Total questions: 25

Worksheet time: 38mins

Name
Class
Date
1.
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
2.

Which of the following is a base pair?

a)

Adenine - Cytosine

b)

Cytosine - Thymine

c)

Deoxyribose - Cytosine

d)

Cytosine - Guanine

3.

A chain of amino acids is called a --

a)

Protein

b)

Lipid

c)

Nucleic Acid

d)

Carbohydrate

4.

Any change in the sequence of DNA is --

a)
transgenic shift
b)
Single Genotype
c)
Monohybrid Trait
d)
Mutation
5.
What type of gene mutation has occurred here? Normal-
AGA-TTC-ATA-GCG
Mutant-
AGA-TTC-AAT-AGC-G
a)
deletion frameshift
b)
insertion frameshift
c)
substitution
d)
nonsense
6.
Where do mutations occur?
a)
DNA and RNA
b)
DNA 
c)
RNA
d)
mRNA and tRNA
7.

Where does TRANSCRIPTION occur?

a)

Nucleus

b)

Ribosome

c)

Cytoplasm

d)

Mitochondria

8.

How many nucleotide bases equal 1 amino acid?

a)

1

b)

2

c)

3

d)

4

9.

How do you know when to begin translating a strand of mRNA?

a)

look for AUG

b)

start at the beginning

c)

look for ATG

d)

when Ms. H tells me to

10.

TRANSCRIBE this DNA sequence: TACGTTACT

a)

AUGCAAUGA

b)

ATGCAATGA

c)

AUGGATUGA

d)

TACGTTACT

11.
In RNA, Uracil pairs with ______. 
a)
cytosine
b)
adenine
c)
guanine
d)
thymine
12.
The process to go from DNA to mRNA is _______
a)
translation
b)
transcription
c)
replication
13.
The process to go from mRNA to a protein is called ____
a)
transcription
b)
rRNA
c)
replication
d)
translation
14.
Choose the nucleotide sequence of the RNA strand that would be complementary to the following strand: 
GTAGTCA
a)
UATUAGA
b)
ACGACTG
c)
CAUCAGU
d)
CATCAGT
15.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
16.
Which 2 molecules form the sides (backbone) of the DNA ladder?
a)
deoxyribose sugar and adenine
b)
deoxyribose sugar and a hydrogen bond
c)
deoxyribose sugar and the nucleus
d)
deoxyribose sugar and phosphate
17.
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
18.

What are the 4 RNA nitrogen bases?

a)

adenine, thymine, cytoplasm, and guanine

b)

adenine, thymine cytosine, and guanine

c)

adenine, uracil, cytoplasm, and guanine

d)

adenine, uracil, cytosine, and guanine

19.

What is the monomer of RNA?

a)

amino acids

b)

nucleotides

c)

fatty acids

d)

polysaccharides

20.

Specialized cells such as muscle, blood, or nerve cells are caused by cell differentiation led by

a)

DNA

b)

nucleus

c)

ribosomes

d)

plasma membrane

21.

Cells differentiate to perform different functions because

a)

all genes are turned on inside that cell

b)

all genes are turned off inside that cell

c)

different genes are turned on inside that cell

d)

different genes are turned on or off inside that cell

22.

While all of the cells in an individual are derived from a single cell, they can differentiate to take on many different types of structure and function. Cells can become specialized because –

a)

mutations can alter the molecular structure of cell membranes

b)

each cell expresses a different sections of DNA

c)

scientists have discovered how to alter the DNA sequences of humans

d)

different cells utilize various forms of RNA nucleotides

23.

Which are external factors that can regulate gene expression?

a)

Operons

b)

Homeobox Genes

c)

Transcription Factors

d)

Temperature

24.

When gene expression occurs

a)

A gene is mutated with either an insertion or deletion

b)

The gene is removed from the genotype in that cell

c)

The gene is passed on to the daughter cells during mitosis

d)

The gene is activated and used in protein synthesis

25.

Which part of DNA and RNA is recognized as part of the code?

a)

Hydrogen Bonds

b)

Nitrogenous Bases

c)

Phosphate groups

d)

5 carbon Sugars.

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