11. Which one of the following diseases is least infectious? (UPSC Prelims 1991)
[A] Leprosy
[B] Tuberculosis
[C] Conjunctivitis
[D] Hepatitis
Show Answer
Correct Answer: D [Hepatitis]
Notes:
Most noninfectious causes of hepatitis are not contagious. Hepatitis caused by alcohol poisoning, medications, or toxins or poisons are not transmitted from person to person.
12. Branch of science dealing with the medicinal plants is known as__?
[A] Pharmacognosy
[B] Pharmacology
[C] Phenology
[D] None of these
Show Answer
Correct Answer: A [Pharmacognosy]
Notes:
Pharmacognosy is the study of drugs or raw drugs produced from natural sources such as plants, microbes, and animals. It involves the analysis of their biological, chemical, biochemical and physical properties.
13.
Who among the following is considered to be the father of Comparative Anatomy?
[A] Georges Cuvier
[B] Stephen Hales
[C] Hugo de Vries
[D] Edwin John Butler
Show Answer
Correct Answer: A [Georges Cuvier]
Notes:
Georges Cuvier is considered to be the father of Comparative Anatomy.
14. Which of the following is the fastest enzyme?
[A] Pepsin
[B] Carbonic anhydrase
[C] DNA polymerase
[D] DNA gyrase
Show Answer
Correct Answer: B [Carbonic anhydrase]
Notes:
An enzyme is a protein that acts as a catalyst in living organisms, and controls the rate of a chemical reaction inside the body. Carbonic anhydrase is mainly found in RBCs of blood cells, pancreatic cells, etc.
15. The biological nature of the virus came from studies by the Russian scientist ____ in 1892 and by the Dutch scientist ____ in 1898.
[A] Dmitry I. Ivanovsky, Martinus W. Beijerinck
[B] Martinus W. Beijerinck, Dmitry I. Ivanovsky
[C] Félix H. d’Hérelle, Frederick W. Twort
[D] Frederick W. Twort, Félix H. d’Hérelle
Show Answer
Correct Answer: A [Dmitry I. Ivanovsky, Martinus W. Beijerinck]
Notes:
The biological nature of viruses was discovered in 1892 by the Russian scientist Dmitry I. Ivanovsky and in 1898 the Dutch scientist Martinus W. Beijerinck’s studies.
16. Except which one is not useful in the treatment of viruses?
[A] acyclovir
[B] interferon
[C] penicillin
[D] antibodies
Show Answer
Correct Answer: C [penicillin]
Notes:
Acyclovir is a synthetic guanosine analog. It is used to treat herpes simplex virus (HSV) and varicella zoster virus (VZV) infections. Antibiotics are useless against viral infections.
17. The part of the fruit formed from the wall of the ripe ovary is called__.
[A] Protoplasm
[B] Pericarp
[C] Ectoderm
[D] Perisperm
Show Answer
Correct Answer: B [Pericarp]
Notes:
The part of the fruit formed from the wall of the ripe ovary is called Pericarp.
18. In which part of the plant does photosynthesis usually takes place?
[A] Flowers
[B] Roots
[C] Leaves
[D] Stems
Show Answer
Correct Answer: C [Leaves]
Notes:
Leaves are the part of the plant where photosynthesis takes place, in which food is made for the plant.
19. Which of these carry water into a leaf?
[A] Leaf blade
[B] Veins
[C] Chlorophyll
[D] Roots
Show Answer
Correct Answer: B [Veins ]
Notes:
Veins carry water into a leaf. The veins in leaves are made up of two major tissues xylem and phloem.
20. Amphibians are represented by how many subclasses?
[A] Two
[B] Three
[C] Four
[D] Seven
Show Answer
Correct Answer: B [Three]
Notes:
Amphibians are represented by three subclasses – Labrinthodontia, Lepospondyli, and Lissamphibia.
