31. Which of the following is protein hormone?
[A] Oxytocin
[B] Insulin
[C] TSH
[D] Antidiuretic hormone
Show Answer
Correct Answer: B [Insulin]
Notes:
Insulin and human growth hormone are protein hormones while oxytocin and antidiuretic hormones are peptide hormones. TSH or Thyroid Stimulating Hormone consists of carbohydrates attached to protein hence it comes under glycoprotein hormone.
32. What is the function of glucagon?
[A] Affects RBC production
[B] Increases heart rate
[C] Lowers blood sugar levels
[D] Raises blood sugar levels
Show Answer
Correct Answer: D [Raises blood sugar levels]
Notes:
Raises blood sugar levels is the function of glucagon.
33. The number of sex chromosomes in the zygote of humans is __
[A] 2
[B] 1
[C] 3
[D] 4
Show Answer
Correct Answer: A [2]
Notes:
The number of sex chromosomes in the zygote of humans is 2.
34. In most species, mitochondrial DNA is passed down from which of the following?
[A] DNA
[B] Mother and Father
[C] Father
[D] Mother
Show Answer
Correct Answer: D [Mother]
Notes:
In most of the species, mitochondrial DNA is passed down from Mother.
35. Which of the following is the best fertilizer for paddy?
[A] Azolla pinnata
[B] Bacillus megatherium
[C] Rhizobium meliloti
[D] Bacillus polymyxa
Show Answer
Correct Answer: A [Azolla pinnata]
Notes:
Azolla pinnata is the best fertilizer for paddy. Azolla pinata is a species of fern that is known by several common names, including mosquito fern, winged mosquito fern, and water velvet.
36. What are the two main technologies that enabled the birth of modern biotechnology?
[A] red biotechnology and green biotechnology
[B] classical and traditional biotechnology
[C] genetics and mathematics
[D] genetic engineering and maintenance of a sterile environment
Show Answer
Correct Answer: D [genetic engineering and maintenance of a sterile environment]
Notes:
Genetic engineering and maintenance of a sterile environment are the two main technologies that enabled the birth of modern biotechnology.
37. The technique of __ crosses the limits of conventional hybridization processes.
[A] immunology
[B] modern hybridization
[C] genetic engineering
[D] cell biology
Show Answer
Correct Answer: C [genetic engineering]
Notes:
The technique of genetic engineering crosses the limits of conventional hybridization processes.
38. Which of the following is the sequence of DNA from where replication begins?
[A] selectable marker
[B] the origin of replication
[C] ter sequence
[D] genetic sequence
Show Answer
Correct Answer: B [the origin of replication]
Notes:
The origin of replication is a sequence of DNA on which replication is initiated on a chromosome, plasmid or virus.
39. Which of the following causes Black Fever?
[A] Leischmania
[B] E.Coli
[C] Azatobactor
[D] Clostridium
Show Answer
Correct Answer: A [Leischmania]
Notes:
Kala-azar is a parasitic disease that is confined to humans which is caused by the Leishmania donovani parasite. It is harboured by an insect called the sand-fly. The term “kala-azar” comes from India where it is the Hindi for black fever. The name “Leischmania donovani” honors two men: the British pathologist William Boog Leishman who in 1903 wrote about the protozoa that causes kalaazar and the researcher C. Donovan, who made the same discovery independently the same year.
40. Diaphragm is a means of contraception. It is fixed ____:
[A] Over cervix
[B] In the uterus
[C] In the fallopian tube
[D] None of the above
Show Answer
Correct Answer: A [Over cervix]
Notes:
The diaphragm is a barrier method of birth control. It is a reusable dome-shaped cup that covers a woman’s cervix, stopping sperm from joining an egg. In order for a diaphragm to work best, it must be used with spermicide (a cream or gel that kills sperm).
