Genetic material of prokaryotes-viral disease of humans

Assignment Help Biology
Reference no: EM13532356

1. What is the basis of grouping species into a single clade?

a. similar noticable characteristics
b. similar names
c. a logical common ancestry
d. similar colors

2. An organism that uses H2S to reduce CO2 to carbohydrate is a:

a. chemoautotroph
b. chemoheterotroph
c. photoautotroph
d. photoheterotroph

3. The genetic material of prokaryotes:

a. can be either DNA or RNA
b. is circular and attached to the plasma membrane
c. is found in a distinct nucleus
d. a and b
e. a and c

4. Which of the following statements about Archaea is FALSE?:

a. Archaea have a peptidoglycan cell wall and a plasma membrane containing branched lipids.
b. Archaea resemble eukaryotes with respect to RNA polymerase and introns.
c. Archaea resemble (eu)bacteria with respect to the absence of a nuclear envelope and the absence of membrane enclosed organelles.
d. Archaea tend to be found in extreme habitats, including miles deep below the earth's surface.
e. Archaea was first recognized as a distinct group of bacteria by Woese

6. Which of the following is TRUE regarding prokaryotes?:

a. Bacilli are spherical shaped bacteria.
b. Plasmids may confer drug resistance to the host cell.
c. Pili are surface structures responsible for chemotaxis.
d. The flagellum spins and is composed of microtubules.
e. They reproduce by mitosis

7. The bacterial cell wall typically consists of:

a. cellulose
b. chitin
c. peptidoglycan
d. protein
e. polysaccharide

8. Which of the following distinguishes Archaea from Bacteria and Eukarya?

a. Archaea use formyl methionine as the initiator amino acid whereas the other two do not.
b. Archaea and Bacteria possess nuclear membrane whereas Eukarya does not.
c. Bacteria and Eukarya have multiple RNA polymerases whereas Archaea have only one.
d. Bacteria and Eukarya have unbranched membrane lipids whereas Archaea have branched membrane lipids.
e. None of the above.

9. Which of the following is TRUE regarding viruses?

a. The capsid consists of host cell encoded protein and encloses either RNA or DNA as hereditary material.
b. Viruses are living entities.
c. Viruses only infect animal hosts.
d. Viruses can transfer genes between organisms.

10. Which of the following is NOT a viral disease of humans?

a. anthrax
b. smallpox
c. Ebola
d. measles
e. rabies

11. Which of the following is TRUE about the progression of HIV infection?

a. T-cells are infected first through association between the particle and the CD4 receptor.
b. T-cells are infected first through the association between the particle, the CD4 receptor and the CXCR4 receptor.
c. T-cells are infected, after macrophages are infected, through the association between the particle and both the CD4 receptor and the CXCR4 receptor.
d. T-cells are infected, after macrophages are infected, through the association between the particle and both the CD4 receptor and the CCR5 receptor.
e. Only macrophages are infected, though the association of the particle with the CD4 receptor and the CCR5 receptor.

12. Which of the following does not describe a prion?

a. is capable of directing the refolding of other prion proteins that were previously doing their normal jobs
b. is highly transmissable, even thorough the stomach
c. contains nucleic acid surrounded by a protein coat
d. cause spongiform encephalies in many different species of animal
e. may be involved in long term memory storage

13. Which of the following is NOT a way that a bacteria is likely to evade the immune system of its host? Note: a macrophage is a giant white blood cell that can "eat" bacteria

a. preventing the macrophages from ingesting it
b. preventing the macrophages from digesting it after ingesting it
c. preventing the macrophages from noticing it by hiding in an intestinal cell
d. inserting its genome into a host cell to await more appropriate conditions
e. changing the proteins expressed on the outside of the cell, through subsequent generations, to avoid an immune response

14. Which of the following is now known to be a large contributing factor in the development of ulcers (a breakdown in the mucus coating the human stomach, resulting in acid erosion of the stomach wall)?

1. A fungus called S. pombe
2. A bacteria called H. pylori
3. Adenovirus
4. An excess production of acid
5. Stress

15. Which of the following diseases would NOT logically be treated with an antibiotic?

a. Cholera
b. Influenza
c. Syphillis
d. Gonherrea
e. Chlamydia

16. Which of the following is not a known function of prokaryotes?

a. Nitrogen fixation
b. Decompositon of organic material
c. Symbiosis with animal hosts
d. Oxygen production
e. all of these are known functions of prokaryotes

17. Which of the following is a general rule applying to the protists?

1. They are all unicellular.
2. They are all eukaryotic.
3. They all have mitochondria.
4. They all have chloroplasts.
5. none of the above

18. Bacteriophages that have become integrated into the host cell chromosome are called

a. intemperate bacteriophages.
b. transposons.
c. prophages.
d. T-even bacteriophages.
e. plasmids.

19. Protease inhibitors are effective in treatment of HIV because they inhibit:

a. exocytosis of mature viruses from the host cell
b. migration of viral DNA to the nucleus
c. processing of viral proteins encoded by gag, pol and env genes
d. reverse transcription of viral RNA into DNA

20. Viruses have some of the properties of living organisms. Which of the following is a characteristic of all organisms, but NOT of viruses?

a. genetic information stored as nucleic acid
b. ability to control metabolism
c. ability to reproduce
d. structure includes proteins
e. plasma membrane

21. Which of the following is NOT correct regarding viruses?:

a. A lytic cycle occurs when viral reproduction causes the host cell to rupture
b. Evolutionarily, viruses may be derived from transposable genetic elements (transposons).
c. In the lysoõclx.øi5, the viral genome is integrated into the host genome as prophage.
d. Reverse transcriptase makes a DNA copy of the HIV genetic material which then integrates into a host cell chromosome.
e. Viruses tend to evolve independently of their hosts.

22. The function of reverse transcriptase in retroviruses is to

a. hydrolyze the host cell's DNA.
b. use viral RNA as a template for DNA synthesis.
c. convert host cell RNA into viral DNA.
d. translate viral RNA into proteins.
e. use viral RNA as a template for making complementary RNA strands.

23. The HIV particle:

a. contains two identical DNA molecules and two reverse transcriptase molecules
b. has a lipid bilayer derived from the host cell
c. is primarily spread through non-sexual contact
d. all of the above
e. none of the above

24. As a group, retroviruses are distinguished from other viral groups by:

a. an outer lipid bilayer derived from the host cell and containing virally encoded protein
b. RNA as hereditary material
c. reverse transcriptase
d. b and c
e. a, b and c

25. Among viruses:

a. T4 infects the intestinal bacterium E. coli
b. lambda phage can have either a lytic or lysogenic life cycle
c. RNA viruses are theJÄtcx.øi5 terms of numbers of genes
d. a and b
e. a, b and c

Reference no: EM13532356

Questions Cloud

What will the phenotypic andgenotypic ratios : In summer squash, white fruit color (W) is dominant over yellowfruit color (w). If a squash plant homozygous for white is crossedwith a plant homozygous for yellow, what will the phenotypic andgenotypic ratios be for:
Describe the fluidity of cell membrane : Describe two ways in which the respiratory and circulatorysystems have been modified in mammals that dive to greatdepths. Explain how your biceps muscle functions (at all levels) to pullyour forearm towards your upper arm. Explain how an electrical i..
Human digestive system secretes numerous chemicals : The human digestive system secretes numerous chemicals that break down organic material. What are three of the safeguards that prevent us from digesting our own tissues?
Give the genotypes of these individuals : Give the genotypes of these individuals? If these genes had been on the same chromosome, would you expectthe same results for potential offspring? Why or why not?
Genetic material of prokaryotes-viral disease of humans : Which of the following is a general rule applying to the protists? Which of the following is NOT a viral disease of humans? Which of the following distinguishes Archaea from Bacteria and Eukarya? The genetic material of prokaryotes: What is the basi..
Solution of glucose : How would you make a 0.1 M solution of glucose The massnumbers for these elements are C=12 O=16 H=1.
Diatomaceous earth is classified as an insecticide : Diatomaceous earth is classified as an “insecticide”by gardeners and is said to control such pets and ants, snails,slugs, and caterpillars. Explain its insecticidal properties.
Control of tryptophan operon including allnecessary elememts : Describe the basic control of the tryptophan operon including allnecessary elements and types or levels of control. Be sure toprovide the physical organization of the operon (diagram suggested)and indicate how each element functions in the control of..
Germ layers-endoderm-ectoderm and mesoderm : Do all organisms on the table have 3 germ layers (endoderm,ectoderm and mesoderm)? If not, which Phyla have fewer than three germ layers?

Reviews

Write a Review

 

Biology Questions & Answers

  What is the prior probability

Tina is consuming 12 mg of iron per day. Her RDA is 15 mg. She has no condition warranting a greater-than-normal need for iron. Which of the statements is true about her consumption of this nutrient.

  Distinguish the inheritance of dominant and recessive genes

What genetic criteria distinguish the inheritance of dominant and recessive genes? Autosomal and sex linked?

  What is the advantage of the respective properties

Cotton and Potatoes. A cotton fiber consists almost exclusively of cellulose, whereas a potato tuber contains mainly starch. Cotton is a tough, fibrous, and virtually insoluble in water.

  Optimal temperature for enzyme function

Select the optimal temperature for enzyme function observed. Note you will have to create your own graph or log in the milliliters of gas bubbles produced on your own to answer this question.

  Calculate the rate of transport by filtration and diffusion

calculate the rate of transport by filtration and diffusion of asmall water soluble, but lipid insoluble solute, such as glucose

  What will be phenotypes and in what ratio of f1 generation

In corn plants, a dominant allele I inhibits kernel color, while the recessive allele i permits color when homozygous. A second dominant allele P produces purple kernel color, while the homozygous recessive genotype pp causes red kernels.

  Compare and contrast the processes of replication

Compare and contrast the processes of replication and transcription. Be sure to include in the discussion a comparison of the purpose of the processes, the templates used in each process, when each process occurs, and the initiation and terminatio..

  Will this type of mutation affect the copy of this gene

A mutation that inactivates a regulatory protein that normally prevents transcription of a gene is said to be trans-acting. Will this type of mutation affect the copy of this gene on the other chromosome?

  Compute the keq for the hydrolysis

The delta G for hydrolysis of the amide group from glutamine is -14.2 kJ/mol at 25C. Compute the keq' for this hydrolysis.

  Characteristic of skeletal muscle

Determine which of the following best explains why cardiac muscle is incapable of tetanus, a sustained contraction characteristic of skeletal muscle?

  What are two cancers that occur predominantly in children

What are two cancers that occur predominantly in children(less than 13 years of age), and why is it thought that these cancers occur early in life?

  What is the function of the retina

What is the function of the retina? What is the function of the choroid layer?

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