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- Question
All algae possess
Options- A. nuclei
- B. chloroplasts
- C. Both (a) and (b)
- D. none of these
- Correct Answer
- Both (a) and (b)
- 1. Which of the following best represents the hierarchy of levels of biological classification?
Options- A. Phylum, kingdom, class, order, genus, species, family
- B. Kingdom, phylum, class, order, family, genus, species
- C. Kingdom, phylum, family, class, order, genus, species
- D. Class, order, kingdom, phylum, family, genus, species Discuss
- 2. Cholera toxin is an A-B type toxin in which the B portions bind to a receptor on a host cell and the A portion enters the cell to cause
Options- A. ADP ribosylation of adenylate cyclase that stops production of cAMP
- B. ADP ribosylation of a G protein that locks it into an active form that stimulates adenylate cyclase to make cAMP
- C. cleavage of rRNA that results in disruption of ribosome function
- D. ADP ribosylation of guanylate cyclase that stimulates production of cGMP Discuss
- 3. Which of the following statement is correct?
Options- A. The size and sequence of introns can be deduced from the cDNA sequence
- B. Restriction endonuclease can cleave ss and dsDNA both
- C. Restriction fragment length polymorphism (RFLP) is usually formed in coding sequence of a gene
- D. Amino acid sequence of a protein can be deduced from corresponding cDNA nucleotide Discuss
- 4. Which of the following(s) is/are the determinants of antigenicity?
Options- A. Chemical nature
- B. Size of the antigen
- C. Foreignness
- D. All of these Discuss
- 5. Organic molecules that increase the rate of metabolic reactions with themselves changing are known as
Options- A. coenzymes
- B. enzymes
- C. substrates
- D. reactants Discuss
- 6. Which of the following is correct for isoantigens?
Options- A. They are antigens found in all members of different species
- B. They are antigens found in some members of a species
- C. They are antigens found in all members of a species
- D. They are antigens found in some members of different species Discuss
- 7. R factors involved in plant-microbe interactions are
Options- A. plant proteins
- B. bacterial proteins
- C. essential for transfer of DNA to plant cells
- D. also called opines Discuss
- 8. In the extracellular medium, DNA-degrading enzymes would likely be to prevent transfer of DNA by
Options- A. conjugal transfer by a self-transmissible plasmid
- B. generalized phage transduction
- C. natural transformation
- D. none of the above Discuss
- 9. When composite transposons are formed
Options- A. a small deletion occurs in the transposase gene of an IS element
- B. a small deletion occurs in the transposase gene of an IS element and plasmid is integrated
- C. an IS element integrates with another IS element with the help of a plasmid
- D. two IS elements integrate into a chromosome with only a small distance separating them Discuss
- 10. In which of the following case a large lattice is formed?
Options- A. Antibody is in excess
- B. Antigens and antibodies are in optimal proportion
- C. Antigen is in excess
- D. None of these Discuss
More questions
Correct Answer: Kingdom, phylum, class, order, family, genus, species
Correct Answer: ADP ribosylation of a G protein that locks it into an active form that stimulates adenylate cyclase to make cAMP
Correct Answer: Amino acid sequence of a protein can be deduced from corresponding cDNA nucleotide
Correct Answer: All of these
Correct Answer: enzymes
Correct Answer: They are antigens found in some members of a species
Correct Answer: plant proteins
Correct Answer: natural transformation
Correct Answer: two IS elements integrate into a chromosome with only a small distance separating them
Correct Answer: Antigens and antibodies are in optimal proportion
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