11. Which of the following is commercially produced from Hybridoma technology? (UPSC Prelims 2000)
[A] Monoclonal antibodies
[B] interferon
[C] antibodies
[D] alcohol
Show Answer
Correct Answer: A [Monoclonal antibodies]
Notes:
Hybridoma technology is used to commercially production of monoclonal antibodies. The monoclonal antibodies are protective protein produced by the clone of single immune cell.
12. Which one of the following organisms can serve as a biofertiliser for rice crop? (UPSC Prelims 2000)
[A] Blue-green algae
[B] Rhizobium sp
[C] Mycorrhizal fungi
[D] Azotobacter sp
Show Answer
Correct Answer: A [Blue-green algae]
Notes:
Blue green algae is used as a biofertilizer in rice crop. Blue green algae has the nitrogen fixing ability which enhances the production of rice. Blue–green algae are not algae at all, but types of bacteria called cyanobacteria that are normally present in many lakes.
13. Which of the following are correctly matched pairs?
- Central Institute of Medicinal and Aromatic Plants – Lucknow
- Centre for DNA Finger Printing and Diagnostics – Hyderabad
- Institute of Microbial Technology – Chandigarh
- National Institute of Immunology – New Delhi
Select the correct option from the codes given below:
(UPSC Prelims 2001)
[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1 & 4
[D] 1, 2, 3 & 4
Show Answer
Correct Answer: D [1, 2, 3 & 4]
Notes:
The Central Institute of Medicinal and Aromatic Plants (CIMAP) is located in Lucknow, the Centre for DNA Fingerprinting and Diagnostics (CDFD) is situated in Hyderabad, the Institute of Microbial Technology (IMTECH) is based in Chandigarh, and the National Institute of Immunology (NII) is in New Delhi. Each of these pairs is correctly matched with their respective locations. Hence, option [D] is the correct answer as all given pairs are correctly matched.
14. Which branch of biology is known for the study of internal body structure?
[A] Anatomy
[B] Biometrics
[C] Pathology
[D] None of these
Show Answer
Correct Answer: A [Anatomy]
Notes:
Anatomy is the branch of biology that studies the structure and parts of organisms. Anatomy is a branch of natural science that deals with the structural organization of living things.
15. Which of the following branch of biology deals with the study of mycoplasma?
[A] Mycoplasmology
[B] Limnology
[C] Ethnobotony
[D] None of these
Show Answer
Correct Answer: A [Mycoplasmology]
Notes:
Mycoplasma is a genus of bacteria that do not have a cell wall surrounding the cell membrane.
16. Robert Hooke is known for which of the following works?
[A] how messages pass between nerve cells in mammals
[B] first use of the word cell
[C] theory of punctuated equilibrium
[D] aquatic ape theory
Show Answer
Correct Answer: B [first use of the word cell]
Notes:
Robert Hooke is known for his discovery of the law of elasticity (Hooke’s law), for his first use of the word cell in the sense of a basic unit of organisms, and for his studies of microscopic fossils, which made him an early proponent of a theory of evolution.
17. Which of the following is true for chromatin?
[A] These are highly condensed DNA
[B] It is found in the nucleus
[C] It contains a single dsDNA
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Chromatin is a complex of DNA and proteins that make up chromosomes within the nucleus of eukaryotic cells.
18. Viruses reproduce in living cells by__?
[A] replication
[B] duplication
[C] multiplication
[D] all of these
Show Answer
Correct Answer: A [replication]
Notes:
DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules.
19. Which bacteria are used in production of biogas/gobar gas plants?
[A] Methanogens
[B] Ethanogens
[C] Propanogens
[D] N-butane
Show Answer
Correct Answer: A [Methanogens]
Notes:
Methanogens belong to the Euryarchaeota of the Archaebacteria. They convert inorganic organic compounds into methane and carbon dioxide.
20. A bryophyte that has nitrogen-fixing blue-green algae in its thallus is__?
[A] Pogonatum
[B] Riccia
[C] Marchantia
[D] Anthoceros
Show Answer
Correct Answer: D [Anthoceros]
Notes:
A bryophyte that has nitrogen-fixing blue-green algae in its thallus is Anthoceros. Species of Anthoceros have a small to medium-sized green thallus.
