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Campbell Biology Chapter 15

Total questions: 24

Worksheet time: 20mins

Name
Class
Date
1.
Protein synthesis takes place in two parts:
a)
Transcription then translation
b)
Replication then transcription
c)
Translation then transcription
d)
Replication then translation
2.
In an analysis of the nucleotide composition of DNA, which of the following will be found? 
a)
A = C 
b)
 A = G and C = T 
c)
A + C = G + T 
d)
G + C = T + A
3.
What is the flow of genetic information in cells from DNA to protein? (Central Dogma)
a)
RNA to DNA to protein
b)
DNA to RNA to protein
c)
protein to DNA to RNA
d)
RNA to protein to DNA
4.
Which of these nitrogenous bases is NOT in DNA?
a)
Uracil
b)
Thymine
c)
Cytosine
d)
Guanine
5.
What is meant by the description "antiparallel" regarding the strands that make up DNA?
a)
The twisting nature of DNA creates nonparallel strands.
b)
One strand is positively charged and the other is negatively charged.
c)
The 5' to 3' direction of one strand runs counter to the 5' to 3' direction of the other strand.
d)
Base pairings create unequal spacing between the two DNA strands
6.
Which scientist(s) mixed a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form?
a)
Griffith
b)
Watson & Crick 
c)
Meselson & Stahl
d)
Chargaff
7.
What is the function of telomeres on a DNA strand?
a)
They are used as a recognition site for DNA helicase to bond & begin "unzipping" the strand for replication.
b)
They bond the Okazaki fragments together forming a continuous replication of DNA on the lagging strand.
c)
When cell continually replicate, the DNA gets shorter so by adding telomeres to the ends of DNA, they extend the life of a cell.
d)
They help untangle the DNA strand prior to DNA helicase's arrival to unzip the DNA strand, readying it for replication.
8.
The genetic code is essentially the same for all organisms. From this, one can logically assume which of the following?
a)
The same codons in different organisms translate into the different amino acids.
b)
A gene from an organism can theoretically be expressed by any other organism.
c)
There is no redundancy in the genetic code
d)
DNA was the first genetic material.
9.
What is the role of DNA ligase in the elongation of the lagging strand during DNA replication?
a)
It catalyzes the lengthening of telomeres.
b)
It synthesizes RNA nucleotides to make a primer.
c)
It unwinds the parental double helix.
d)
It joins Okazaki fragments together.
10.
RNA is read in sections called:
a)
Triplets
b)
Genes
c)
Codons
d)
SNuRPs
11.
The enzyme that builds RNA during transcription is
a)
DNA Polymerase
b)
RNA Poymerase
c)
Primase
d)
RNA LIgase
12.
If a DNA sequence is ATACGA, the mRNA that is produced would be
a)
TATGCT
b)
ATACGA
c)
AUAGCA
d)
UAUGCU
13.
What portions of the pre-mRNA are removed during the RNA modification step?
a)
introns
b)
exons
c)
SNuRPs
d)
the 5' cap
14.
Where does the process of translation take place in a eukaryotic cell?
a)
Nucleus
b)
Rough ER
c)
Ribosome
d)
Lysosomes
15.

A group of 3 nucleotide bases in an RNA molecules is a(n)

a)

codon

b)

anticodon

c)

triplet

d)

amino acid

16.

The most common step of protein synthesis that is regulated in prokaryotes and eukaryotes is

a)

RNA processing

b)

translation

c)

chromatin modification

d)

transcription

17.

The lac operon

a)

is only active when lactose is present

b)

is only active when lactose is absent

c)

is regulated by epigenetics

d)

is found in eukaryotic cells

18.

In eukaryotes, translation takes place at this location in the cell.

a)

nucleus

b)

nucleolus

c)

ribosome

d)

smooth ER

19.

Silent mutations

a)

Do not change the DNA molecule

b)

are caused by a frameshift mutation.

c)

Change the amino acid sequence, but not the shape of the protein

d)

Do not change the amino acid sequence

20.

The molecules that transport amino acids to the ribosome are

a)

mRNA

b)

snRNA

c)

tRNA

d)

rRNA

21.

The RNA molecules that are involved in removing introns are

a)

mRNA

b)

snRNA

c)

tRNA

d)

rRNA

22.

DNA replication takes place

a)

prior to translation

b)

prior to cell division

c)

to activate gene expression

d)

between transcription and translation

23.

Which of the following would NOT be heterochromatin?

a)

A gene coding for a glycolysis enzyme

b)

A Barr body

c)

A telomere

d)

A centromere

24.

Negative feedback means that

a)

The end product of a pathway triggers increased production of that product

b)

Regulation of a pathway is lost after the product is produced

c)

The end product of a pathway triggers reduced production of that product

d)

Molecules that are produced by a pathway are inhibited by the cell

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