11. What field in which “Luc Montagnier” is famous for?
[A] Discovery of Ebola Virus
[B] Discovery of Influenza Virus
[C] Discovery of Human Immunodeficiency Virus
[D] Discovery of Polio Virus
Show Answer
Correct Answer: C [Discovery of Human Immunodeficiency Virus]
Notes:
Luc Antoine Montagnier (born 18 August 1932) is a French virologist and joint recipient, with Françoise Barre-Sinoussi and Harald Zur Hausen, of the 2008 Nobel Prize in Physiology or Medicine for his discovery of the human immunodeficiency virus (HIV). He has worked as a researcher at the Pasteur Institute in Paris and as a full-time professor at Shanghai Jiao Tong University in China.
12. Which modern concept was pioneered by Rudolf Virchow?
[A] pathological processes
[B] process of fermentation
[C] isotopes as tracers to study chemical and biological processes
[D] None of these
Show Answer
Correct Answer: A [pathological processes]
Notes:
Rudolf Virchow was a German pathologist and politician who pioneered the modern concept of disease processes by his application of cell theory to explain the effects of disease in body organs and tissues.
13. Who has introduced Two Kingdom Classification?
[A] Carolus Linnaeus
[B] Ernest Haeckel
[C] Copeland
[D] RH Whittaker
Show Answer
Correct Answer: A [Carolus Linnaeus]
Notes:
Carolus Linnaeus proposed Two kingdom of classification in which he classified organisms into Plantae and Animalia.
14. Who among the following discovered the plasma membrane?
[A] Robert Hooke
[B] Albert von Kolliker
[C] George E. Palade
[D] Rudolf von Kölliker
Show Answer
Correct Answer: A [Robert Hooke]
Notes:
The plasma membrane is mainly composed of fatty-acid-based lipids and proteins. Robert Hooke discovered the plasma membrane.
15. A segment of DNA consists of 120 adenine and 120 cytosine bases. What is the total number of nucleotides present in the segment?
[A] 120
[B] 240
[C] 345
[D] 480
Show Answer
Correct Answer: D [480]
Notes:
According to Chargaff’s laws, the amount of adenine is always equal to that of thymine, and the amount of guanine is always equal to that of cytosine, i.e. A = T(120) and G = C (120), hence, the total no. The number of nucleotides would be 120 x 4 = 480.
16. Which is the largest Bryophyta?
[A] Funaria (Moss)
[B] Marchantia
[C] Megaceros
[D] Dowsonia
Show Answer
Correct Answer: D [Dowsonia]
Notes:
Dawsonia is a taxonomy of moss. They are the largest bryophytes. Dawsonia plants are generally known for being tall. It has thicker leaves than the common moss.
17. Name the plant tissue which helps in the transport of food.
[A] Xylem
[B] Aerenchyma
[C] Phloem
[D] Chlorenchyma
Show Answer
Correct Answer: C [Phloem]
Notes:
Phloem tissue helps in the transport of food throughout the plant. The diverse elements of phloem include phloem fibers, sieve tubes, phloem parenchyma, and companion cells.
18. The structural unit of photosynthesis is___.
[A] Thylakoid
[B] Grana
[C] Chlorophyll
[D] None
Show Answer
Correct Answer: A [Thylakoid]
Notes:
Thylakoid is the structural unit of photosynthesis and it is present in the stroma, stroma is present in the inner structure of the chloroplast.
19. The importance of day length in plants was first shown in__?
[A] Barley
[B] Lettuce
[C] Tobacco
[D] Tomato
Show Answer
Correct Answer: C [Tobacco]
Notes:
The importance of day length in the flowering of plants was first shown in tobacco.
20. Which disease is known as the killer disease of wheat?
[A] Stem rust
[B] Loose smut
[C] Flag smut
[D] Karnal bunt
Show Answer
Correct Answer: A [Stem rust]
Notes:
The stem rust fungus damages wheat, leaving a characteristic brown stain that’s why this is known as the killer disease of wheat.
