11. Who among the following was awarded the Nobel Prize in Medicine in 1926 for his contribution to cancer research?
[A] Christiaan Eijkman
[B] Johannes Fibiger
[C] Julius Wagner-Jauregg
[D] Charles-Jules-Henri Nicolle
Show Answer
Correct Answer: B [Johannes Fibiger]
Notes:
Johannes Fibiger was awarded the Nobel Prize in Medicine in 1926 for his contribution to cancer research.
12. Cell theory was formulated by __?
[A] Charles Darwin
[B] Theodor Schwann
[C] Robert Hooke
[D] Robert Koch
Show Answer
Correct Answer: B [Theodor Schwann]
Notes:
The classical cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. In the first part explains that all organisms are made up of cells. The second part explains that cells are the basic units of life. The third part, explains that cells come from preexisting cells that have multiplied. It was described by Rudolf Virchow in 1858.
13. Which of the following give maximum energy after breaking down?
[A] Fat
[B] Sugar
[C] Carbohydrate
[D] Protein
Show Answer
Correct Answer: A [Fat]
Notes:
Fat gives maximum energy after breaking down, fat is composed of essential carbon and hydrogen atoms releasing 9.1 calories per gram of energy.
14. 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.
15. Plants that reproduce by spores are classified into which of the following?
[A] Bryophytes
[B] Sporophytes
[C] Cryptogams
[D] Thallophytes
Show Answer
Correct Answer: C [Cryptogams]
Notes:
A cryptogam is a plant or plant-like organism that reproduces by spores without flowers or seeds.
16. Which of the following may be most likely to be missing from a gram-positive bacterium?
[A] Penicillin-binding protein
[B] Peptidoglycan
[C] Lipopolysaccharide
[D] Phospholipid bilayer membrane
Show Answer
Correct Answer: C [Lipopolysaccharide]
Notes:
Gram-negative bacteria are surrounded by a thin peptidoglycan cell wall. It itself is surrounded by an outer membrane containing lipopolysaccharides.
17. Covered smut of Sorghum is caused by which of the following?
[A] Sphacelotheca sorghi
[B] Sphacelotheca cruenta
[C] Sphacelotheca reiliana
[D] Tolyposporium ehrenbergii
Show Answer
Correct Answer: A [Sphacelotheca sorghi]
Notes:
Sporisorium sorghi is a fungus in the family of Ustilaginaceae. It is a plant pathogen that causes the covered scum of sorghum.
18. Alpha-ketoglutarate dehydrogenase results in__?
[A] Oxidation and Decarboxylation
[B] Shortage
[C] oxidation
[D] none of these
Show Answer
Correct Answer: A [Oxidation and Decarboxylation]
Notes:
Alpha-ketoglutarate dehydrogenase is a highly regulated enzyme, which may determine metabolic flux through the Krebs cycle.
19. Which of the following is not a function of Ethylene?
[A] stimulates the conversion of starch and acids to sugars
[B] promotes germination in some cereals
[C] stimulate shoot elongation, seed germination
[D] fruit ripening, flower wilting, and leaf fall
Show Answer
Correct Answer: C [stimulate shoot elongation, seed germination]
Notes:
The function of Ethylene – stimulates the conversion of starch and acids to sugars, promotes germination in some cereals, and sprouting of bulbs and potatoes and is also associated with fruit ripening, flower wilting, and leaf fall.
20. There are two nuclei at the end of the pollen tube, what are they called?
[A] Tube nucleus and a generative nucleus
[B] Sperm and ovum
[C] Generative nucleus and stigma
[D] Tube nucleus and sperm
Show Answer
Correct Answer: A [Tube nucleus and a generative nucleus]
Notes:
The tube nucleus and a generative nucleus are two nuclei at the end of the pollen tube.
