31. Which is the Growth hormone inhibiting hormone?
[A] FSH
[B] TRH
[C] GHRH
[D] Somatostatin
Show Answer
Correct Answer: D [Somatostatin]
Notes:
Somatostatin works against Growth Hormone (GHRH), hence it is known as Growth Inhibiting Hormone. It consists of two peptides of 14 and 28 amino acids and is released from neurosecretory nerves.
32. Malaria is an acute febrile illness caused by__.
[A] Salmonella typhi
[B] Mycobacterium
[C] Plasmodium parasites
[D] Bordetella pertussis
Show Answer
Correct Answer: C [Plasmodium parasites]
Notes:
Malaria is an acute febrile illness caused by Plasmodium parasites. Malaria is a parasitic disease that is transmitted to humans through the bite of infected mosquitoes.
33. Which of the following is the earliest geological period?
[A] Cambrian
[B] Permian
[C] Jurassic
[D] Quaternary
Show Answer
Correct Answer: A [Cambrian]
Notes:
Cambrian is the earliest geological period. The Cambrian period was the first geological period of the Paleozoic Era and the Phanerozoic Eon.
34. A rare way that a trait or disorder can be passed down through families is called which of the following?
[A] Sex-linked recessive
[B] Sex-linked dominant
[C] Autosomal dominant
[D] None of these
Show Answer
Correct Answer: B [Sex-linked dominant]
Notes:
A rare way that a trait or disorder can be passed down through families is called Sex-linked dominant. An abnormal gene on the X chromosome can cause sex-linked dominant disease.
35. What is Southern blotting?
[A] Attachment of probes to DNA fragments
[B] Transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet
[C] Comparison of DNA fragments to two sources
[D] Transfer of DNA fragments to electrophoretic gel from cellulose membrane
Show Answer
Correct Answer: B [Transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet]
Notes:
Southern blotting is the transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet.
36. What may complicate the process of gene cloning within the cell?
[A] One recognition site
[B] Foreign DNA
[C] More than one recognition site
[D] Antibody
Show Answer
Correct Answer: C [More than one recognition site]
Notes:
The recognition site is the sequence of DNA where the DNA is cleaved. The presence of more than one recognition site can result in multiple cuts within the DNA leading to DNA fragmentation. This would complicate the process of gene cloning.
37. In coriander, the useful parts are
____:
[A] Leaves & flowers
[B] Flowers & dried fruits
[C] Roots & leaves
[D] Leaves & dried fruits
Show Answer
Correct Answer: D [Leaves & dried fruits]
Notes:
Coriander (Coriandrum sativum), also known as cilantro, Chinese parsley or dhania, is an annual herb in the family Apiaceae. All parts of the plant are edible, but the fresh leaves and the dried seeds are the parts most traditionally used in cooking.
38. Uric acid is the chief nitrogenous wastes in ____:
[A] Frogs
[B] Birds
[C] Fishes
[D] Mankind
Show Answer
Correct Answer: B [Birds]
Notes:
Land snails, insects, birds, and some reptiles excrete uric acid as the major nitrogenous waste. The white, crystalline substance seen in a typical bird or lizard “poop” is actually urine: a little pool of uric acid crystals in a very small amount of water.
39. Which of the following acids is synthesized in human stomach?
[A] Hydrochloric acid
[B] Sulphuric acid
[C] Nitric acid
[D] Phosphoric acid
Show Answer
Correct Answer: A [Hydrochloric acid]
Notes:
A typical adult human stomach will secrete about 1.5 liters of gastric acid daily. The best-known component of gastric juice is hydrochloric acid, the secretory product of the parietal, or oxyntic cell. It is known that the capacity of the stomach to secrete HCl is almost linearly related to parietal cell numbers.
40. The ____ helps in equalising the pressure on either sides of the eardrum:
[A] Malleus
[B] Incus
[C] Cochlear nerve
[D] Eustachian tube
Show Answer
Correct Answer: D [Eustachian tube]
Notes:
The eustachian tube is a canal that connects the middle ear to the nasopharynx. It controls the pressure within the middle ear, making it equal with the air pressure outside the body. The cochlear nerve is also known as the acoustic nerve. It transfers auditory information from the cochlea (auditory area of the inner ear) to the brain. The malleus transmits the sound vibrations from the eardrum to the incus, and then to the stapes.
