Log in
Biology
1
answer
0
watching
98
views
10 Aug 2019

Which of the following is NOT a feature of plasmids?

a. They can exist only as a single copy within a host cell

b. They can replicate independently from host DNA

c. They remain separate from the bacterial genome

d. They carry genes that may confer an advantage to the host cell

e. They carry an origin of replication

Watch
1
answer
0
watching
98
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Nestor Rutherford
Nestor RutherfordLv2
12 Aug 2019

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share

Related textbook solutions

Molecular Cell Biology
8 Edition,
Lodish
ISBN: 9781464183393
Biology: Science for Life with Physiology
6 Edition,
Belk
ISBN: 9780134555430
Concepts of Biology
OER Edition,
Openstax
ISBN: 9781938168116
Biology
2nd Edition, 2013
Openstax
ISBN: 9781947172517
Essentials of Biology
5 Edition,
Mader
ISBN: 9781259660269

Related questions

Most temperate phages integrate into the host chromosome, whereas some replicate as plasmids. Which kind of relationship do you think would be more likely to maintain the phage in the host cell, and why?

A.Plasmids-they're smaller, so they'd be easier to replicate by the host cell.

B.Integrated-the host cell would be less likely to view this DNA as "foreign" on subsequent rounds of replication, and would retain it more easily.

C.Integration-because plasmids are frequently lost during cell division, which could leave a daughter cell without the virus genome.

D.Plasmids-these structures often carry other genes that may give the host cell a selective advantage over cells that don't have them.

2.)

a.) Are viruses that infect Archaea different from other bacterial viruses?

Yes, they do not have protein coats because of the extreme conditions where they live.
No, they consist of nucleic acid and protein just like other bacterial viruses.
Yes, the structure of archaeal viruses is always completely different from other bacterial viruses.

Yes, they have only DNA genomes.

b.) Of the following examples, which is not a common part of many viral life cycles?

The pox virus genome is replicated by DNA polymerase.
Adenoviruses attach to the cell and the nucleocapsid is taken up by the cell.
Pox viruses replicate in the cytoplasm of the cell.

Once an adenovirus virion is inside a cell, host RNA polymerases transcribe early genes

c.) Some viruses are associated with cancer. There are a variety of ways in which viruses may affect a cell in a way that may lead to cancer. Based on your knowledge of the life cycles of viruses and of molecular genetics, what is one way that this might happen?

Viral genetic material inserts into a host genome close to the termination sequence, far downstream of the promoter, and causes a silent mutation.
Viral genetic material inserts into a host genome in a repetitive noncoding region.
Viral genetic material inserts into a host genome, placing a promoter in a new location and turning on a gene that had previously been turned off.
Viral genetic material inserts into a host genome and causes a mutation in a promoter, turning off a gene that had previously been turned on.

d.) Which statement describes the difference between the normal neuron protein PrPC and the pathogenic version PrPSc?

PrPC is just a protein and the PrPSc is a protein with nucleic acid inside.
The PrPC protein contains more beta sheets while the PrPSc protein contains more alpha helices.
The three-dimensional conformation is identical, but the amino acid sequence is different.
The amino acid sequence is identical, but the three-dimensional conformation is different.

1. You have cloned a human gene along with its promoter and ribosome-binding site in a bacterial cloning vector and then introduced the recombinant plasmid into a bacterial host cell that supports the replication and segregation of the cloning vector. Unfortunately, even though you know the whole human gene sequence is present (by DNA hybridization); you cannot get expression of the gene. Which of the following is NOT a reason why there is no expression?

A. The vector cannot replicate

B. The human promoter is not recognized by the bacterial host cell

C. The ribosome-binding site is not recognized by the bacterial host cell

D. The human gene lacks introns, so it is not transcribed by the host bacterium

2. Restriction endonucleases are:

A. sequence-specific

B. able to recognize any 4-, 6-, or 8-base pair sequence

C. always able to produce single stranded tails

D. only able to cleave bacterial DNA

3. Which of the following is NOT a required characteristic of cloning vectors?

A. Genes for replication of vector DNA and segregation to progeny cells

B. Genes for selection of cells carrying the vector (e.g., antibiotic-resistance)

C. DNA sequence for the introduction of foreign DNA where the integrated DNA does not disable the vector

D. None of the above

4. A poly (T) primer is used to produce cDNA from mammalian mRNA. Which of the following would be used to produce cDNA from bacterial mRNA?

A. A poly (T) primer

B. A random DNA sequence primer

C. A poly (A) primer

D. A poly (GC) primer

Related Documents

BIO130H1
Final Exam
Study Guide
BIO130H1 Study Guide - Final Guide: Molecular Cloning, Lambda Phage, Recombinant Dna
beigegnat745
BIO 3124 Lecture Notes - Lecture 12: Escherichia Coli, Insertion Sequence, Streptomycin
ceriseshark335
BIO 2306 Chapter Notes - Chapter 9: Lytic Cycle, Plasmid, Dna Replication
sangriaskunk365

Weekly leaderboard

Home
Homework Help 3,900,000
Biology 460,000
Start filling in the gaps now
Log in