A difference between adult and embryonic stems cells is

they'll exhibit different patterns of DNA methlation

The ability of a virus to infect hosts cells is dependent upon

the proteins surrounding host cell and those in viral capsid

In DNA technology a vector refers to

a plasmid used to transfer DNA into host cell

Which would likely get a ubiquitin tag

cyclin protein that acts in G1 in a cell in G2 phase

In order to insert a human gene into a plasmid, both must

be cut by the same restriction enzyme.

Which of the following best explains why how recombinant DNA technology works

complimentary base pairing, same bases in all organisms

The inducible lac operon could be permanently repressed by

inability of inducer (lactose) to bind to repressor

The rate of migration of DNA fragments through a gel is determined by:

number of nucleotides in the fragment

Antiviral drugs would be most effective via

interference with viral replication

Which is a problem in getting prokaryotic cells to express human genes

Bacteria lack splicing enzymes b/c they don't have introns

What would occur if lac repressor couldn't bind to operator

continuous transcription of operon's genes

Mutations that result in altered metabolism like PKU are the result of

mutated genes dictating production of specific enzymes

Which of the following best describes why PCR is a standard technique used in biology research?

It can produce large amounts of a specific DNA sequence.

What does the operon model attempt to explain?

the coordinated control of gene expression in bacteria

The gene code is often said to be redundant meaning

more than 1 codon can code for the same amino acid

Why can a tobacco plant be made to express a gene from fireflies?

Transcription and translation are similar in each

Which of the following is a characteristic of the lytic cycle?

A large number of phages are released at a time.

The tryptophan operon is a repressible operon that is

turned off whenever tryptophan is added.

If a bacterial cell had no restriction enzymes, which of the following would happen?

The cell would be easily infected by bacteriophages.

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AP Biology: Bacteria, Viruses, Gene Expression, and Genetic Technology

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#AP Biology #Ch 17-20 Test

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Questions 29

Answers

1
A difference between adult and embryonic stems cells is
nonstem cells have fewer repressed genes
they'll exhibit different patterns of DNA methlation
they'll have identical gene expression
2
What is the complimentary DNA strand for 3' AAA-GAA-UAA-CAA 5'
TTT-CTT-ATT-GTT
phe-ile-val-gly
UUU-CUU-AUU-GUU
3
The coding sequence of DNA is AAA. The anticodon on the tRNA that binds the mRNA codon is ____
UUU
AAA
TTT
phe
4
The ability of a virus to infect hosts cells is dependent upon
whether its nucleic acid is DNA or RNA.
the enzymes carried by the virus
the proteins surrounding host cell and those in viral capsid
5
Which is needed to make cDNA from RNA
DNA ligase
a plasmid
reverse transcriptase
restriction enzymes
6
Cell differentiation is the result of different cells containing
different genes
different promoters
different regulatory sequences
different regulatory proteins
7
In DNA technology a vector refers to
a radioactive probe used to id a DNA sequence
a plasmid used to transfer DNA into host cell
a restriction site recognized by restriction enzymes
8
Which would likely get a ubiquitin tag
mRNA produced by egg until after fertilization
an mRNA leaving nucleus to be translated
cyclin protein that acts in G1 in a cell in G2 phase
glycoprotein requiring transport from ER
9
In order to insert a human gene into a plasmid, both must
originate from the same type of cell.
be cut by the same restriction enzyme.
have identical DNA sequences.
be the same length.
10
Which would be affected by a single base substitution
all amino acids after the mutation (frameshift)
only a single amino acid
not possible for single base to change protein
11
Which of the following best explains why how recombinant DNA technology works
organisms are able to transfer genes via conjugation
complimentary base pairing, same bases in all organisms
transformation and viral transduction
12
The inducible lac operon could be permanently repressed by
inability of cell to produce lactase
inability of inducer (lactose) to bind to repressor
inability of repressor to bind to operator
13
The rate of migration of DNA fragments through a gel is determined by:
length of tiem the electrophoresis unit is able to operate
volume of the starting sample
number of nucleotides in the fragment
ratio of adenine to cytosine in the fragment
14
Antiviral drugs would be most effective via
antibiotic treatment
removal of viral mRNA
removal of viral proteins
interference with viral replication
15
Which is a problem in getting prokaryotic cells to express human genes
Bacteria lack splicing enzymes b/c they don't have introns
their genetic codes differ b/c bacteria use Uracil in DNA
Bacterial ribosomes are too small to translate human mRNA
Prokaryotic spliceosomes only recognize bacterial introns
16
What would occur if lac repressor couldn't bind to operator
nothing repressors aren't needed in inducible operons
reduced transcription of operon's gene
continuous transcription of operon's genes
17
Mutations that result in altered metabolism like PKU are the result of
mutated genes dictating production of specific enzymes
affected individuals lack key splicing factors
enzymes made of DNA & affected ppl lack DNA polymerase
18
Which of the following best describes why PCR is a standard technique used in biology research?
It uses inexpensive materials and produces perfect results.
It can duplicate the entire human genome.
It can produce large amounts of a specific DNA sequence.
It can purify sections of a DNA moecule.
19
Translation requires
mRNA, tRNA, DNA, and rRNA
mRNA, tRNA, and rRNA
mRNA, DNA, and tRNA
20
Which mutation would likely have the most impact on the finished polypeptide
deletion of a codon
substitution of first base in a codon
substitution of 3rd base in a codon
deletion of a nucleotide
21
Muscle cells and nerve cells in one species of animal owe their differences in structure to
using different genetic codes
having different genes
differential gene expression
having different chromosomes
22
What does the operon model attempt to explain?
bacterial resistance to antibiotics
the mechanism of viral attachment to a host cell
horizontal transmission of plant viruses
the coordinated control of gene expression in bacteria
23
The gene code is often said to be redundant meaning
more than 1 codon can code for the same amino acid
the genetic code is universal for all organisms
the code is different in different organisms
a codon can code for multiple amino acids
24
Why can a tobacco plant be made to express a gene from fireflies?
Chloroplasts produce light if firefly proteins are injected.
Fireflies and tobacco share a recent common ancestor
Transcription and translation are similar in each
25
Which of the following is a characteristic of the lytic cycle?
Many bacterial cells containing viral DNA are produced.
The viral genome replicates without destroying the host.
A large number of phages are released at a time.
Viral DNA is incorporated into the host cell genome.
26
RNA splicing and chromosomal remodeling
are method of eukaryotic gene expression
may involve the winding or unwinding of nucleosomes
may involve new combinations of exon expressed
all of the above
27
During gel electrophoresis, why would various bands be visible
the negatively charged electrode repels DNA
the size of the fragment dictates where bands are located
all of the above
DNA fragments are created using restriction enzymes
28
The tryptophan operon is a repressible operon that is
permanently turned on.
turned on only when tryptophan is present.
turned off when glucose is present.
turned off whenever tryptophan is added.
29
If a bacterial cell had no restriction enzymes, which of the following would happen?
The cell would create incomplete plasmids.
The cell would be easily infected by bacteriophages.
The cell would become a parasite.
The cell would be unable to replicate its DNA.

AP Biology: Bacteria, Viruses, Gene Expression, and Genetic Technology Flashcards | StudBud