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Unit 7: Gene Expression and Regulation Reivew

Total questions: 45

Worksheet time: 39mins

Name
Class
Date
1.
Which of the following units are repeatedly joined together to form a strand of DNA?
a)
amino acids
b)
nucleotides
c)
fatty acids
d)
polysaccharides
2.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
3.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
4.
Which sequence of complementary 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
5.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains uracil
6.
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
7.
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
8.

In eukaryotes, which organelle is DNA usually found in?

a)

cell membrane

b)

vacuole

c)

chloroplast

d)

nucleus

9.

What is the principal enzyme involved in DNA replication

a)

glucose

b)

fructose

c)

DNA Polymerase

d)

Lactase

10.
DNA replication results in two DNA molecules,
a)
each one with two original strands
b)
each one with two new strands
c)
each one with one new strand and one original strand
d)
one with two new strands and the other with two original strands
11.
order of replication
a)
3, 4, 2, 1
b)
3, 1, 4, 2
c)
2, 1, 4, 3
d)
3, 4, 1, 2
12.
After analyzing a sample of DNA, a scientist recorded the data shown in the table. What percentage of the DNA sample is cytosine?
a)
22%
b)
25%
c)
28%
d)
56%
13.
Any change in the sequence of DNA is...
a)
transgenic shift
b)
Single Genotype
c)
Monohybrid Trait
d)
Mutation
14.
Identify the DELETION mutation form the following: 
ATG CCA AAT
a)
ATG TCA AAT
b)
ATG CCT AAA T
c)
ATC CA  AT
d)
ATG CCA AAT
15.

A section of DNA has these bases: TAG CAG TAC. What mRNA sequence is produced fro this DNA section?

a)

ATC GTC ATG

b)

AUC GUC AUG

c)

AUG CUG AUC

d)

UTC GTC UTG

16.

Which best summarizes the role of DNA in the production of proteins?

a)

DNA moves to the cytoplasm to build proteins.

b)

DNA transports amino acids to the ribosomes to make proteins.

c)

DNA contains the instructions used to make proteins.

d)

DNA breaks hydrogen bonds between amino acids.

17.
How does RNA differ from DNA?
a)
RNA contains uracil and deoxyribose
b)
RNA contains ribose and thymine
c)
RNA contains uracil and ribose
d)
RNA contains adenine and ribose
18.

What is the correct order to make a protein?

a)

Protein, DNA, RNA

b)

RNA, DNA, Protein

c)

DNA, RNA, Protein

d)

Protein, RNA, DNA

19.

Which RNA brings amino acids?

a)

rRNA

b)

tRNA

c)

mRNA

20.

What enzyme does transcription use?

a)

DNA polymerase

b)

ligase

c)

RNA polymerase

d)

helicase

21.

Where does transcription take place?

a)

Cytoplasm

b)

Nucleus

22.

Where does translation take place?

a)

Cytoplasm

b)

Nucleus

23.
In mRNA, each codon specifies a particular 
a)
nucleotide
b)
amino acid
c)
purine
d)
pyrimidine
24.

What are the building blocks of proteins called?

a)

nucleotides

b)

proteins

c)

amino acids

d)

carbohydrates

25.
Using the codon identify the amino acid sequence:
AUG-CCA-GUA-GGG-UAA
a)
MET-HIS-ALA-GLY-STOP
b)
MET-PRO-GLY-VAL-STOP
c)
MET-PRO-VAL-GLY-STOP
d)
MET-THR-SER-ASP-STOP
26.
What structure in a cell is the site for making proteins?
a)
ribosomes
b)
mitochondria
c)
lysosome
d)
Golgi body
27.
Which amino acid is made from the RNA codon UUA?
a)
Phenylalanine
b)
Leucine
c)
Serine
d)
Tyrosine
28.
What is the relationship between a protein, the cell, and DNA?
a)
DNA is produced by protein which is produced in the cell
b)
Protein is composed of DNA which is produced in the cell
c)
DNA makes RNA which produces protein in the cell
d)
A cell is composed of DNA and protein
29.
Process in which amino acids are assembled into proteins at the ribosome?
a)
Translation
b)
Transcription
c)
Meiosis
d)
Replication
30.

What is the correct sequence of protein synthesis?

A. tRNA brings amino acids to the ribosome

B. DNA molecules serve as the templates for mRNA.

C. mRNA molecules move to ribosomes.

D. Polypeptides are formed on ribosomes.

a)

A-B-C-D

b)

B-C-A-D

c)

C-B-A-D

d)

D-B-A-C

31.

Overall, protein synthesis consists of these steps

a)

DNA synthesis, RNA synthesis and transcription

b)

transcription and translation

c)

DNA synthesis, transcription and translation

32.

What is the central dogma of biology?

a)

DNA codes for RNA, which guides enzyme synthesis

b)

DNA codes for RNA, which guides protein synthesis

c)

RNA codes for DNA, which guides protein synthesis

d)

RNA codes for DNA, which guides enzyme synthesis

33.

The enzyme ___ unwinds DNA. during the replication process.

a)

helicase

b)

multicase

c)

mutations

d)

operon

34.

A strand containing ribose and uracil is called ___.

a)

protein

b)

tRNA

c)

mRNA

d)

RNA

35.

The ability of E. Coli to control its gene transcription in response to environmental factors is called ___.

a)

operon

b)

anitcodon

c)

exon

d)

adenine

36.

Which two DNA nucleotides are collectively called purines?

a)

adenine & thyamine

b)

adenine & guanine

c)

thytosine & guanine

d)

thyamine & guanine

37.

What group do these bases belong to?

a)

Purines

b)

Pyrimidines

38.

What group do these bases belong to?

a)

Purines

b)

Pyrimidines

39.
The "on/off" switch for an operon is called the _________.
a)
promoter
b)
repressor
c)
operator
d)
gene
40.
A protein that binds to the operator and blocks the RNA polymerase
a)
regulator
b)
repressor
c)
activator
d)
corepressor
41.
What is the name of the binding site of RNA polymerase in eukaryotes?
a)
operator
b)
operon
c)
inducer
d)
promoter
42.
What does the repressor protein do?
a)
Allows RNA polymerase to read the gene
b)
Prevents RNA polymerase from reading the gene
c)
Reads the gene
d)
Translates the gene
43.
Which type of operon is shown in the image?
a)
inducible operon
b)
repressible operon
c)
positive control operon
d)
can't determine this from the image
44.
Operons are found in the cells of which of the following types of organisms?
a)
prokaryotes (bacteria)
b)
eukaryotes (plant and animals)
c)
animals only
d)
viruses
45.
What type of operon is the lac (lactose) operon?
a)
inducible
b)
repressible
c)
positive control
d)
promoible

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