Multiple choice questions - gene regulation

Assignment Help Biology
Reference no: EM1398088

Question 1
Select one answer.
CRP protein binds to the lac operon under conditions of low glucose. Its role in the expression of genes in the lac operon is:
A. to transcribe DNA to mRNA for the structural genes in the operator.
B. It increases the binding of lactose to the lac repressor, causing it to be released from the operator.
C. It enhances the binding of RNA polymerase to the lac operon, increasing transcription
D. It bumps the lac repressor off the DNA, allowing transcription of the genes for lactose metabolism.
Question 2
Select one answer.
Which of the following refers to variations in the same gene, which result in different phenotypes?
A. Chromosome
B. DNA
C. Allele
D. Genotype
Question 3
Select one answer.
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:
A. Uncondensing of the DNA, to allow for expression of the genes.
B. mutations accumulated in the regulatory region of the gene that code for lactose metabolizing enzymes.
C. Changing the behavior of a DNA binding protein that regulates expression of these genes.
Question 4
Select one answer.
Eukaryotic DNA is packaged into nucleosomes due to the action of
A. histones
B. DNA helicases
C. repressor proteins
D. RNA polymerases
Question 5
Select one answer.
In what type of cell do genes contain exons which are interrupted by introns, that are spliced out after transcription.
A. Prokaryotic
B. Eukaryotic
C. Both prokaryotic and eukaryotic cells.
Question 6
Select one answer.
Assuming that the genes required for sucrose (table sugar) degradation are contained within an operon, then under conditions of low sucrose, you would expect:
A. The repressor protein to bind to the operator, preventing transcription.
B. The repressor protein to bind to the operator, allowing transcription.
C. The repressor protein released from the operator, allowing transcription.
D. The repressor protein released from the operator, preventing transcription.
Question 7
Select one answer.
Which of the following represents a change that CANNOT be passed on to the next generation?
A. Changes in gene expression due to increased production of a hormone.
B. Changes in DNA packaging leading to gene silencing.
C. Changes in DNA sequence due to exposure to radiation.
D. None of the above, they are all heritable changes.
Question 8
Select one answer.
DNA resides in the nucleus of the cell in a prokaryotic cell, but not a eukaryotic cell.
A. True
B. False

Reference no: EM1398088

Questions Cloud

Average amount of output for shift workers : Suppose a firm evaluates the productivity of the three shifts of workers who work in their factory. Each shift's performance is measured based on the amount of output that is produced during the shift - day, evening, or swing shift.
Analyze strengths and weaknesses of draft : Your office is moving to the new location. Your colleague, David Burke, is not strong writer, and he knows that you have currently taken professional writing seminar. Analyze strengths and weaknesses of David's draft.
Multiple choice questions - macroevolution : A swarm of insects blows out to sea in a storm. They arrive at a tiny island and form a new population. After many generations, they have diverged from the source population on the mainland.
Chance that business venture will be highly disappointing : If these are the only outcomes possible for the business venture, what is the chance that the business venture will be considered Highly Disappointing?
Multiple choice questions - gene regulation : CRP protein binds to the lac operon under conditions of low glucose. Its role in the expression of genes in the lac operon is.
Hospital tests-five vials from each shipment : The hospital tests five vials from each shipment. If at least one of the five is ineffective, find the conditional probability pf that shipment's having come from C.
N terminal signal sequence : An ER membrane protein that has an N-terminal signal sequence and a single stop transfer sequence will. Which of the following is NOT a possible target of proteins imported into the ER?
Testing of hypothesis-anova : A study investigated the perception of corporate ethical values among individuals specializing in marketing. Using a=.05 and the following data (higher scores indicates higher ethical values) test for significant differences in perception among th..
What are the genotypes of the two yellow plants : The red kernel color in wheat is caused by the presence of at least one dominant allele from each of the two idependently segregating gene pairs.

Reviews

Write a Review

Biology Questions & Answers

  Finding possible pathways

Suppose that a series of compounds has been found in  Neurospora . Compounds A-F appear to be members of an enzyme pathway.

  Aspects of transpiration and phloem transport

Briefly describe three specific aspects of transpiration and phloem transport that involve active transport of molecules.

  What is the most probable cause in this patients case

What veins are most likely involved? What pathologic changes have happened in these veins, and what is the most probable cause in this patient's case.

  How penetrance and expressivity affect expression of allele

Explain how penetrance and expressivity can affect the expression of an allele and how epigenetic phenomena affect the observed pattern of inheritance.

  Explain the differences in head movement available to fish

What fraction of demes in each set is likely to become fixed for allele A1 versus A2. Explain the differences in head movement available to fish.

  Arrangement and function of muscles

At start of abduction of arm, deltoid muscle is assisted by: subclavius., supraspinatus, coracobrachialis, Biceps brachii.

  What is the biochemical fallacy of this process

Certain unscrupulous operators offer, for a fee, to freeze recently deceased individuals in liquid nitrogen until medical science can cure the disease from which they died. What is the biochemical fallacy of this process.

  How much dna,carried on how many chromosomes

Diploid nuclei of the ascomycete, Neurospora crassa, contain 14 chromosomes. A single diploid cell in an ascus will undergo one round of meiosis, followed in each of daughter cells by one round of mitosis, producing a total of eight ascospores.

  Determine the percent o2 content in the room after 12 hours

A new reality TV show includes a "contest" to survive solitary confinement. To win, the contestant must remain for 12 hours in an air-tight room that is 5ft X 5ft X 8 ft.

  When a nucleic acid undergoes hydrolysis, resulting subunits

When a nucleic acid undergoes hydrolysis, resulting subunits

  Find the concentration in mg/ml

A 2.5 mg/ml stock solution was diluted as described in the table below and then the absorbance of each dilution was estimated and presented in the table given below.

  Linkage disequilibrium and lod score

BIOL 6150 home work, Linkage disequilibrium and LOD score,  Assume the disease genotype is known, as  A  is the disease allele and  a  is the normal allele. The marker has four alleles (1, 2, 3,4).

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd