Gene Regulation Quiz Schedule: Available now.Due 09/27/2015 11:59 PM EDT Questio

Question

Gene Regulation Quiz

Schedule:

Available now.Due 09/27/2015 11:59 PM EDT

Question 1

Select one answer.

10 points

Which of the following terms describes the macromolecule that carries genetic information?

DNA

Allele

Gene

Chromosome

Question 2

Select one answer.

10 points

Eukaryotic DNA is packaged into nucleosomes due to the action of

RNA polymerases

DNA helicases

histones

repressor proteins

Question 3

Select one answer.

10 points

The start codon signals the start of ___________________.

Replication

Translation

Transcription

Question 4

Select one answer.

10 points

When bacteria are grown in lactose they produce enzymes required for lactose metabolism. When placed in glucose, these enzymes are no longer produced. The expression of these genes is likely due to:

Changing the behavior of a DNA binding protein that regulates expression of these genes.

Uncondensing of the DNA, to allow for expression of the genes.

mutations accumulated in the regulatory region of the gene that code for lactose metabolizing enzymes.

Question 5

Select one answer.

10 points

Which of the following refers to variations in the same gene, which result in different phenotypes?

Genotype

Allele

DNA

Chromosome

Question 6

Select one answer.

10 points

DNA resides in the nucleus of the cell in a prokaryotic cell, but not a eukaryotic cell.

True

False

Question 7

Select one answer.

10 points

Which of the following represents a change that CANNOT be passed on to the next generation?

Changes in gene expression due to increased production of a hormone.

Changes in DNA packaging leading to gene silencing.

Changes in DNA sequence due to exposure to radiation.

None of the above, they are all heritable changes.

Question 8

Select one answer.

10 points

What is a promoter?

It’s a region of RNA that binds ribosome to begin protein synthesis.

It’s a region of DNA that binds DNA polymerase to begin replication.

It’s a region of DNA that binds RNA polymerase to begin transcription

It’s a protein that promotes transcription

Question 9

Select one answer.

10 points

In what type of cell do genes contain exons which are interrupted by introns, that are spliced out after transcription.

Prokaryotic

Eukaryotic

Both prokaryotic and eukaryotic cells.

Question 10

Select one answer.

10 points

At what point in the cell cycle will eukaryotic DNA be most condensed (tightly packaged)?

G1 phase

M phase

S phase

G2 phase

G0 phase

Explanation / Answer

1. DNA describes the macromolecule that carries genetic information

2. Eukaryotic DNA is packaged into nucleosomes due to the action of Histones

3. The start codon signals the start of Translation

4. Changing the behavior of a DNA binding protein that regulates expression of these genes

5. Allele

6. False it resides in eukaryotic cell

7. Changes in gene expression due to increased production of a hormone

8. Promoter is a region of DNA that binds RNA polymerase to begin transcription

9. Eukaryotes because processing of DNA is done by introns

10. During M phase the eukaryotic DNA is most condensed (tightly packaged)

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