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

Transcription and translation are similar in each.

What is the main source of genetic variation in bacterial cells?

Mistakes during DNA replication

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.

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 is the function of reverse transcriptase in retroviruses?

It uses viral RNA as a template for DNA synthesis.

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

be cut by the same restriction enzyme.

What does the operon model attempt to explain?

the coordinated control of gene expression in bacteria

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

A large number of phages are released at a time.

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

number of nucleotides in the fragment

studbud

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

14 termsStudBud Administration17 plays

AP Biology Ch 18-20 Test

Flashcards14 cardsFPractice quizPHost liveL

Questions 14

Answers

1
How can a tobacco plant be made to express a gene from fireflies?
Fireflies and tobacco share a recent common ancestor.
Transcription and translation are similar in each.
Chloroplasts produce light if firefly proteins are injected.
They are infected by the same types of bacteria.
2
What is the main source of genetic variation in bacterial cells?
Mistakes during DNA replication
Crossing over
Conjugation
Random assortment of chromosomes
3
During gel electrophoresis, why would DNA be labeled with radioactive phosphorous?
To visualize the DNA fragments
To stimulate DNA replication
To speed up the rate of separation by electrophoresis
To inhibit the uptake of unlabled DNA
4
The tryptophan operon is a repressible operon that is
turned on only when tryptophan is present.
permanently turned on.
turned off when glucose is present.
turned off whenever tryptophan is added.
5
In humans, the HIV virus attacks what types of cells?
Red blood cells
Epidermal cells
Neurons
White blood cells
6
If a bacterial cell had no restriction enzymes, which of the following would happen?
The cell would be easily infected by bacteriophages.
The cell would become a parasite.
The cell would create incomplete plasmids.
The cell would be unable to replicate its DNA.
7
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 produce large amounts of a specific DNA sequence.
It can duplicate the entire human genome.
It can purify sections of a DNA moecule.
8
What is the function of reverse transcriptase in retroviruses?
It hydrolyzes the host cell DNA.
It translates viral RNA into proteins.
It uses viral RNA as a template for DNA synthesis.
It converts host cell RNA into viral DNA.
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
Muscle cells and nerve cells in one species of animal owe their differences in structure to
having different genes
having different chromosomes
using different genetic codes
differential gene expression
11
What does the operon model attempt to explain?
horizontal transmission of plant viruses
bacterial resistance to antibiotics
the coordinated control of gene expression in bacteria
the mechanism of viral attachment to a host cell
12
Which of the following is a characteristic of the lytic cycle?
A large number of phages are released at a time.
Viral DNA is incorporated into the host cell genome.
The viral genome replicates without destroying the host.
Many bacterial cells containing viral DNA are produced.
13
The rate of migration of DNA fragments through a gel is determined by:
volume of the starting sample
number of nucleotides in the fragment
length of tiem the electrophoresis unit is able to operate
ratio of adenine to cytosine in the fragment
14
What enzyme is necessary for a retrovirus, such as HIV, to reproduce?
Reverse transriptase
Lactase
Helicase
DNA ligase

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