11. Hugo de Vries is related to which of the following theory of biology?
[A] aquatic ape theory
[B] modern anatomy
[C] Mutation Theory
[D] theory of evolution
Show Answer
Correct Answer: C [Mutation Theory]
Notes:
Hugo de Vries is a Dutch botanist and geneticist who pioneered the experimental study of biological evolution. His rediscovery of Gregor Mendel’s principles of heredity and his theory of biological mutation in 1900.
12. Who among the following is considered as the father of microbiology?
[A] Stephen Hales
[B] Antonie Van Leeuwenhoek
[C] Edwin John Butler
[D] Pier Antonio Micheli
Show Answer
Correct Answer: B [Antonie Van Leeuwenhoek]
Notes:
Antoine van Leeuwenhoek used the single-lens microscope he built to make the first observations of bacteria and protozoa. Leeuwenhoek is universally acknowledged as the father of microbiology.
13. In which group maximum nutritional diversity is found?
[A] Monera
[B] Plantae
[C] Fungi
[D] Animalia
Show Answer
Correct Answer: A [Monera]
Notes:
The state of Monera has the highest nutritional diversity. Photoautotrophic, chemoautotrophic and heterotrophic have all possible types of nutrition
14. In which of the following β-oxidation mainly occurs?
[A] Mitochondria
[B] Cytoplasm
[C] Nucleus
[D] Chloroplast
Show Answer
Correct Answer: A [Mitochondria
]
Notes:
β-oxidation in mammals occurs in both mitochondria and peroxisomes, whereas plants and most fungi switch off β-oxidation.
15. How many amino acids are needed to make proteins?
[A] 19
[B] 20
[C] 21
[D] 22
Show Answer
Correct Answer: B [20]
Notes:
Amino acids combine to form protein. It requires 20 amino acids to make a protein in both plants and animals. Amino acids and protein are considered as the main body building blocks.
16. Which of the following is true about the cell wall of Gram-positive bacteria?
[A] It consists of multiple layers
[B] It is thicker than that associated with gram-negative bacteria
[C] It contains teichoic acids
[D] All of these
Show Answer
Correct Answer: D [All of these]
Notes:
The cell wall of Gram-positive bacteria are: consists of multiple layers, thicker than that associated with gram-negative bacteria and contains teichoic acids.
17. Fungal disease – Black rust of wheat is caused by?
[A] Melampsora lini
[B] Claviceps purpurea
[C] Puccinia graminis tritici
[D] Albugo candida
Show Answer
Correct Answer: C [Puccinia graminis tritici
]
Notes:
Leaf rust caused by Puccinia triticina is the most common rust disease of wheat. The disease occurs where wheat, barley, and other cereal crops are grown.
18. Which of the following is the diploid chromosome number found in bryophytes?
[A] Spore mother cell
[B] Gametes
[C] Spores
[D] Meiospores
Show Answer
Correct Answer: A [Spore mother cell]
Notes:
Spore mother cell is the diploid chromosome number found in bryophytes.
19. A typical gymnospermous plant has 8 chromosomes in leaf cells. What will be the number of chromosomes in the cells of its gametophyte?
[A] 16
[B] 8
[C] 4
[D] 24
Show Answer
Correct Answer: C [4]
Notes:
The gametophytic phase involves the production of male and female gametophytes which are haploid cells. Thus, if the gymnosperm plant has 8 chromosomes then the gametophyte will have 4 chromosomes.
20. Where does a functional megaspore develop in an angiosperm?
[A] Endosperm
[B] Embryo
[C] Embryo-sac
[D] Ovule
Show Answer
Correct Answer: C [Embryo-sac]
Notes:
Functional megaspore in an angiosperm develops into Embryo-sac. The embryo sac is an oval structure present in the ovule of flowering plants.
