11. Which organ is associated with the production of insulin in the human body?
[A] Pancreas
[B] Liver
[C] Kidney
[D] Heart
Show Answer
Correct Answer: A [Pancreas]
Notes:
Insulin is a hormone made by an organ located behind the stomach called the pancreas. It allows body to use sugar from carbohydrates in the food. Insulin helps keep blood sugar level from getting too high (hyperglycemia) or too low (hypoglycemia).
12. Oxygen transportation in a human body takes place through
I. Blood
II. Lungs
III. Tissue
The correct sequence of transportation is (UPSC Prelims 1997)
[A] I, II, III
[B] III, I, II
[C] II, I, III
[D] I, III, II
Show Answer
Correct Answer: C [II, I, III]
Notes:
The lungs serve to exchange the two gases in the blood. Oxygen enters the blood from the lungs and carbon dioxide is expelled out of the blood into the lungs. The blood serves to transport both gases. Oxygen is carried to the cells and tissues.
13. Which of the following branch of biology deals with the study and rearing of grasses?
[A] Agrostology
[B] Agronomy
[C] Dendrology
[D] Phenology
Show Answer
Correct Answer: A [Agrostology]
Notes:
Agrostology, the branch of botany concerned with the study of grasses, especially their taxonomy.
14. Which branch of biology is known for the study of developmental process of organisms?
[A] Genetics
[B] Evolution
[C] Histology
[D] Heredity
Show Answer
Correct Answer: B [Evolution]
Notes:
In branch of biology, the study of developmental process of organisms is known as Evolution. The theory of evolution is based on the idea that all species are related and change slowly over time. Charles Darwin’s theory of evolution states that evolution occurs by natural selection.
15. The viruses in an attenuated vaccine?
[A] have no genome
[B] continue to replicate
[C] are usually larger than bacteria
[D] is altered with chemicals
Show Answer
Correct Answer: B [continue to replicate]
Notes:
The viruses in an attenuated vaccine continue to replicate. Attenuated vaccines do not usually cause disease like those caused by the wild form of the organism.
16. Pyrenoids are the center of the formation of__?
[A] Enzymes
[B] Proteins
[C] Fats
[D] Starch
Show Answer
Correct Answer: D [Starch]
Notes:
Pyrenoids are the center of the formation of Starch. Pyrenoids are non-membrane-bound organelles found in the chloroplasts of algae and hornwort plants. It can be seen by light-microscopy.
17. Which one of the following is the innermost part of a flower and the female reproductive organ?
[A] Stamen
[B] Pistil
[C] Stigma
[D] Sepals
Show Answer
Correct Answer: B [Pistil]
Notes:
The pistil is the innermost part of a flower and the female reproductive organ consists of three parts – the stigma, the style and the ovary collectively known as the pistil.
18. Euphorbiaceae, Apocynaceae, Composites come under which tissue?
[A] Laticiferous
[B] Glandular
[C] Sclerenchyma
[D] Collenchyma
Show Answer
Correct Answer: A [Laticiferous]
Notes:
Euphorbiaceae, Apocynaceae, Composites come under Laticiferous tissues.
19. Which is the type of photosynthesis reaction?
[A] Oxidation-Reduction reaction
[B] Synthesis reaction
[C] Organic reaction
[D] Replacement reaction
Show Answer
Correct Answer: A [Oxidation-Reduction reaction]
Notes:
In the process of photosynthesis, which is done by chlorophyll, plants prepare food, intake carbon dioxide, and release oxygen. Photosynthesis is considered an Oxidation-Reduction reaction.
20. Which of the following is not a characteristic of non-chordates?
[A] cylindrical, triploblastic, coelomate, or pseudocoelomate animals
[B] Modes of reproduction involve sexual and asexual
[C] body includes a closed circulatory system
[D] Respiration takes place through gills, trachea or body surface
Show Answer
Correct Answer: C [body includes a closed circulatory system]
Notes:
Chordates body includes a closed circulatory system. Whereas non-chordates are cylindrical, triploblastic, coelomate, or pseudocoelomate animals, modes of reproduction involve sexual and asexual and respiration takes place through gills, trachea, or body surface.
