11. Which of the following plants is biennial? (UPSC Prelims 1989)
[A] Banana
[B] Pineapple
[C] Jack fruit
[D] Carrot
Show Answer
Correct Answer: D [Carrot]
Notes:
The Carrot plant is biennial and develops, in its second year.
12. 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.
13. Which device is used to measure the growth in plants?
[A] Anemograph
[B] Seismograph
[C] Crescograph
[D] All the above
Show Answer
Correct Answer: C [Crescograph]
Notes:
Crescograph is a device which is used to measure the growth in plants which was developed by Sir Jagadish Chandra Bose in the first half of 20th century.
14. Empedocles is related to which of the following theory of biology?
[A] theory of cell
[B] theory of natural selection
[C] theory of mutation
[D] theory of disease
Show Answer
Correct Answer: B [theory of natural selection]
Notes:
Empedocles formulated a theory of natural selection. He proposed that everything in existence is composed of different combinations of four elements: air, fire, water and earth.
15. The Six Kingdoms of Classification is also known as the latest classification system. By whom is it given?
[A] C Woese
[B] O Kandler
[C] Mc Wheels.
[D] Ernest Haeckel
Show Answer
Correct Answer: A [C Woese]
Notes:
In biology, a scheme of classifying organisms into six kingdoms: Proposed by Carl Woese et al: Animalia, Plantae, Fungi, Protista, Archaea/Archaeabacteria, and Bacteria/Eubacteria.
16. Who among the following discovered the cytoplasm?
[A] Rudolf von Kölliker
[B] Camillo Golgi
[C] Christian de Duve
[D] Walther Flemming
Show Answer
Correct Answer: A [Rudolf von Kölliker]
Notes:
The term was introduced by Rudolf von Kölliker in 1863. It was originally synonymous with protoplasm, but later changed to mean cell matter and organelles outside the nucleus.
17. Which of the following viruses is not linked to human cancer?
[A] Hepatitis C virus
[B] Hepatitis B virus
[C] Varicella-Zoster virus
[D] Herpes simplex virus type 2
Show Answer
Correct Answer: C [Varicella-Zoster virus]
Notes:
Hepatitis C, Hepatitis B and Herpes simplex virus type 2 viruses which are linked to human cancer.
18. Which Viruses are Relatively Thermostable?
[A] Human immunodeficiency virus
[B] Rubella virus
[C] Hepatits A virus
[D] Influenza virus
Show Answer
Correct Answer: C [Hepatits A virus]
Notes:
Hepatitis A virus are Relatively Thermostable. A highly contagious liver infection caused by the hepatitis A virus.
19. Which of the following is not caused by bacteria?
[A] Typhoid
[B] Tetanus
[C] Plague
[D] Chicken pox
Show Answer
Correct Answer: D [Chicken pox]
Notes:
Chickenpox is a contagious disease caused by the varicella-zoster virus (VZV).
20. How many ribosomes are there in eukaryotic cells?
[A] 70S
[B] 60S
[C] 80S
[D] Not specific
Show Answer
Correct Answer: C [80S]
Notes:
All prokaryotes have 70S (S = Svedberg units) ribosomes whereas eukaryotes have large 80S ribosomes in their cytosol.
