1. Opium is obtained from the dry latex from which part of the Papaver somniferum Plant?
[A] Stem
[B] Leaves
[C] Poppy
[D] Stem joints
Show Answer
Correct Answer: C [Poppy]
Notes:
Opium is dried latex which is obtained from the seed capsules of the opium poppy Papaver somniferum.
2. “Rinderpest” disease, which was recently eliminated was caused by which among the following?
[A] Bacteria
[B] Virus
[C] Fungi
[D] Nematode
Show Answer
Correct Answer: B [Virus]
Notes:
Rinderpest which is also called as cattle plague or steppe murrain was an infectious viral disease of cattle, domestic buffalo, and many other species of even-toed ungulates, including buffaloes. It was recently eliminated.
3. Which among the following is involved in movement of Muscles?
[A] Myoglobin
[B] Myosin
[C] Mucin
[D] None of the above
Show Answer
Correct Answer: B [Myosin]
Notes:
Myosins refers to a superfamily of motor proteins known for their roles in muscle contraction and other motility processes in eukaryotes. These proteins are basically specialized motor machines that convert the cellular free energy to mechanical work. They depend on ATPs for actin based motility.
4. Which of the following groups of plants is known as Magnoliophyta?
[A] Gymnosperms
[B] Angiosperms
[C] Algae
[D] Bryophyte
Show Answer
Correct Answer: B [Angiosperms]
Notes:
Angiosperms are known as Magnoliophyta. Angiosperms are vascular plants which have stems, roots, and leaves.They are plants that produce flowers and bear their seeds in fruits.
5. Late Hargobind Khorana had received Nobel Prize in physiology in 1968, for work on which among the following?
[A] Mechanisms of the action of hormones
[B] Chemical Structure of antibodies
[C] Interpretation of the genetic code
[D] Structural and functional organization of the cell
Show Answer
Correct Answer: C [Interpretation of the genetic code]
Notes:
Late Hargobind Khorana had received Nobel Prize in physiology in 1968, for work on interpretation of the genetic code. Har Gobind Khorana was an Indian American biochemist.
6. In human body, the regulation of RBC production is accomplished by a harmone which is secreted by __:
[A] Liver
[B] Bone marrow
[C] Kidney
[D] Pancreas
Show Answer
Correct Answer: C [ Kidney]
Notes:
The regulation of RBC production is accomplished by the Erythropoietin hormone secreted by the kidneys.
7. Malaria can be caused by:
[A] all anopheles mosquitoes
[B] all culex mosquitoes
[C] only males Culex mosquitoes
[D] only female anopheles mosquitoes
Show Answer
Correct Answer: D [ only female anopheles mosquitoes]
Notes:
The Plasmodium parasite that causes malaria is neither a virus nor a bacterium – it is a single-celled parasite that multiplies in red blood cells of humans as well as in the mosquito intestine. When the female mosquito feeds on an infected person, male and female forms of the parasite are ingested from human blood.
8. Which of the following is the reason behind when one enters a dark room; he is not able to see anything but after some time his vision improves?
[A] The retina of the eye comes forward
[B] The retina of the eye moves backward
[C] The pupil of the eye contracts
[D] The pupil of the eye dilates
Show Answer
Correct Answer: D [The pupil of the eye dilates]
Notes:
Our eyes cannot see everything clearly when we enter a dark room from a bright light. This is due to the reason that in dark room the pupil is large so when we come out in bright light, a large amount of light enters our eyes and we feel glare.
9. Which of the following features of DNA makes in uniquely suited to store and transmit genetic information from generation to generation?
[A] Complementarity of the two stands
[B] Double helix
[C] Number of base-pairs per turn
[D] Sugar-phosphate backbone
Show Answer
Correct Answer: A [Complementarity of the two stands]
Notes:
Complementary base pairing in the DNA double helix (with its complementary DNA strands) describes the manner in which deoxyribose- nucleotides bind to each other. Essentially it means that the bases are arranged along the molecule such that the chains fit together snugly so as to be lightly secured by hydrogen bonds.
10. Which one of the following statements is not correct?
[A] All echinoderms are viviparous
[B] Round worm has no circulatory system
[C] In bony fishes, swim bladder is usually present
[D] In cartilaginous fishes, fertilisation is internal
Show Answer
Correct Answer: A [All echinoderms are viviparous]
Notes:
Echinoderm is the common name given to any member of the phylum Echinodermata of marine animals. The adults are recognizable by their radial symmetry, and include such well-known animals as starfish, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or “stone lilies”.
The sexes are separate except few echinoderm species. There is no sexual dimorphism. Fertilization is external and few forms are viviparous.
