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- Question
Which of the following is a characteristic unique to the ciliates?
Options- A. Use of cilia as a sensory function
- B. Presence of both a macronucleus and several micronuclei
- C. Both (a) and (b)
- D. Possess a light-detecting eye spot
- Correct Answer
- Both (a) and (b)
- 1. The membranes of which domains are chemically the most similar?
Options- A. Archaea and Bacteria
- B. Bacteria and Eukarya
- C. Eukarya and Archaea
- D. membranes of all three domains are chemically identical Discuss
- 2. Eukaryotic cell organelles first emerged
Options- A. from a specialized lineage of cells within the kingdom Protista
- B. when prokaryotes engulfed each other and became interdependent
- C. when bacteria made their first attempts at reproduction
- D. just before the origin of the animal and fungal kingdoms Discuss
- 3. Which of the following is not true for eukaryotic cells?
Options- A. Nucleus is bounded by nuclear membrane
- B. Chromosomes contain histones
- C. Chloroplasts and mitochondria contains 70S ribosomes
- D. Gas vacuoles are present Discuss
- 4. A characteristic of protein synthesis in both the archaea and eukarya is
Options- A. transcription and translation are coupled
- B. translation is inhibited by diphtheria toxin
- C. proteins are synthesized from D-, rather than L-, isomers of amino acids
- D. the initiator tRNA is charged with N-formyl-methionine Discuss
- 5. Archeal cells usually do not contain peptidoglycan, rather contain pseudo-peptidoglycan which is mainly composed of
Options- A. N-acetylmuramic acid and L-amino acids
- B. N-acetylmuramic acid and D-amino acids
- C. N-acetyltalosaminuronic acid and D-amino acids
- D. N-acetyltalosaminuronic acid and L-amino acids Discuss
- 6. Cell theory includes all of the following except
Options- A. all organisms are composed of one or more cells
- B. the cell is the most primitive form of life
- C. the cell is the structural unit of life
- D. cells arise by division of preexisting cells Discuss
- 7. Which of the following may account for the small size of the cells?
Options- A. The rate of diffusion
- B. The surface area/volume ratio
- C. The number of mRNAs that can be produced by the nucleus
- D. All of the above Discuss
- 8. Which of the following is/are included in Kingdom Prokaryotae?
Options- A. Bacteria
- B. Protozoa
- C. Fungi
- D. All of these Discuss
- 9. The three domain version of life on earth is based on the
Options- A. nucleic acid sequence data
- B. morphological traits
- C. metabolic traits
- D. characteristics of the cell wall Discuss
- 10. Which of the following sequences has helped in identifying eukaryotes, eubacteria and archeabacterial cell types?
Options- A. Signature sequence
- B. Signal sequence
- C. Shine-Dalgarno sequence
- D. Amino acid sequence Discuss
Micro Organisms problems
Search Results
Correct Answer: Bacteria and Eukarya
Correct Answer: when prokaryotes engulfed each other and became interdependent
Correct Answer: Gas vacuoles are present
Correct Answer: proteins are synthesized from D-, rather than L-, isomers of amino acids
Correct Answer: N-acetyltalosaminuronic acid and L-amino acids
Correct Answer: the cell is the most primitive form of life
Correct Answer: All of the above
Correct Answer: Bacteria
Correct Answer: nucleic acid sequence data
Correct Answer: Signature sequence
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