11. Which pigment is responsible for the colour of healthy skin in human beings?
[A] Bilirubin
[B] Haemoglobin
[C] Melanin
[D] Progesterone
Show Answer
Correct Answer: C [Melanin]
Notes:
The single most factor responsible for the cpolour of the skin is the pigment melanin. It is secreted by the melanocytes within the skin.
12. How many chromosomes are present in human beings?
[A] 44
[B] 46
[C] 48
[D] 42
Show Answer
Correct Answer: B [46]
Notes:
Human beings have 46 chromosomes in their cells. 22 pairs of autosomes and 2 special chromosomes called sex chromosomes are present.
13. To which of the following kingdoms does the yeast belong to?
[A] Bacteria
[B] Virus
[C] Fungus
[D] None of the above.
Show Answer
Correct Answer: C [Fungus]
Notes:
Yeast is an unicellular eukaryotic micro organism belonging to the family of fungus.
14. Which branch of medicine deals with the scientific study of the structure of teeth and diseases associated with it?
[A] Virology
[B] Opthalmology
[C] Cosmology
[D] Odontology
Show Answer
Correct Answer: D [Odontology]
Notes:
Odontology is a branch of medicine which deals with the structure and diseases related to the teeth.
15. Which of the following statements are correct with respect to homeostasis?
1. Ecosystems are capable of maintaining their state of equilibrium.
2. They cannot regulate their own species structure and functional processes.
Select the correct option from the codes given below:
[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 & 2
Show Answer
Correct Answer: A [Only 1]
Notes:
Ecosystems are capable of maintaining their own state of equilibrium. They can regulate their own species structure and functional processes. This capacity of ecosystem of self regulation is referred to as homeostasis.
16. Which of the following is studied in Ethnobotany?
[A] Practical use of plants by local culture and people
[B] Relations between Plants and peoples Behvaior
[C] Comparison of different plants in a particular area
[D] Study of relations of plants, animals and animals in an area
Show Answer
Correct Answer: A [Practical use of plants by local culture and people]
Notes:
Ethnobotany is the study of the plants of an area and their practical uses through the traditional knowledge of a local culture and people.
17. Which branch of biology is known for the scientific study of organic matter in living things?
[A] Photophysical
[B] Biochemistry
[C] Biotechnology
[D] Molecular Biology
Show Answer
Correct Answer: B [Biochemistry]
Notes:
Biochemistry is the application of chemistry to the study of biological processes at the cellular and molecular level.
18. What are plants without seeds having vascular tissue?
[A] Gymnosperms
[B] Bryophytes
[C] Angiosperm
[D] Pteridophytes
Show Answer
Correct Answer: D [Pteridophytes]
Notes:
Pteridophyte is a type of vascular plant, which spreads spores. Pteridophytes produce neither flowers nor seeds, they are sometimes referred to as “cryptogams”.
19. Which of the following cell organelles contain RNA?
[A] Plastids
[B] Mitochondria
[C] Ribosomes
[D] Lysosomes
Show Answer
Correct Answer: C [Ribosomes]
Notes:
Ribosomes are small organelles that contain RNA and specific proteins within the cytoplasm.
20. The sporophytic and gametophytic stages are independent in__?
[A] Bryophytes
[B] Pteridophytes
[C] Phaeophytes
[D] Gymnosperms
Show Answer
Correct Answer: B [Pteridophytes]
Notes:
Pteridophytes show alternation of generations, in which they exhibit a dominant sporophytic generation with an inconspicuous gametophytic generation. The sporophyte is differentiated into root, stem and leaves whereas, the small and inconspicuous gametophyte is independent and autotrophic.
