31. Which of the following is an accessory reproductive gland in male mammals?
[A] Inguinal gland
[B] Prostate gland
[C] Mushroom-shaped gland
[D] Gastric gland
Show Answer
Correct Answer: B [Prostate gland]
Notes:
The prostate gland is an accessory reproductive gland in male mammals. It is located just below the bladder in men.
32. Which female organ serves as the birth canal to allow the delivery of the fetus during labor?
[A] Ovaries
[B] Uterus
[C] Fallopian Tubes
[D] Vagina
Show Answer
Correct Answer: D [Vagina]
Notes:
The vagina is a female reproductive organ that serves as the birth canal to allow the delivery of the fetus during labor.
33. What is fertilization?
[A] Release of egg from the ovary
[B] Release of sperm from testis
[C] Mixing of semen with vaginal fluid
[D] Fusion of sperm with egg nuclei
Show Answer
Correct Answer: D [Fusion of sperm with egg nuclei]
Notes:
The release of an egg from the ovary is called Ovulation. Sperm is the release of sperm from the testis. Conception is the release of semen into the vagina. Fertilization is the process that leads to the fusion of male and female gametes.
34. What are the symptoms of brucellosis in animals?
[A] arthritis in cows and pigs
[B] mastitis and lameness in goats
[C] oozing skin lesions in horses
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Arthritis in cows and pigs, mastitis and lameness in goats, and oozing skin lesions in horses are the symptoms of brucellosis in animals.
35. Klinefelter’s syndrome is an example of which of the following disorder?
[A] Mendelian Disorder
[B] Mitochondrial Inheritance
[C] Multifactorial Genetic Inheritance
[D] Chromosomal Disorder
Show Answer
Correct Answer: D [Chromosomal Disorder]
Notes:
Klinefelter’s syndrome is an example of Chromosomal Disorder in which a genetic condition that results when a boy is born with an extra copy of the X chromosome.
36. Bacteria protect themselves from viruses by fragmenting viral DNA?
[A] Ligase
[B] Endonuclease
[C] Exonuclease
[D] Gyrase
Show Answer
Correct Answer: C [Exonuclease]
Notes:
Bacteria protect themselves from viruses by fragmenting viral DNA with Exonuclease. Enzymes that work by cleaving one nucleotide at a time from the end (Exo) of the polynucleotide chain are called exonucleases.
37. Symbiotic Bacteria responsible for the fixation of atmospheric nitrogen are present in ____:
[A] Peas
[B] Oats
[C] Corn
[D] Wheat
Show Answer
Correct Answer: A [Peas]
Notes:
Nitrogen-fixing bacteria are microorganisms capable of transforming atmospheric nitrogen into fixed nitrogen. Rhizobium is one such bacteria that is associated with leguminous plants (e.g., various members of the pea family). It invades the root hairs of host plants and convert free nitrogen to ammonia, which the host plant utilizes for its development.
38. Azolla increases soil fertility for ____:
[A] Wheat cultivation
[B] Rice cultivation
[C] Maize cultivation
[D] Barley cultivation
Show Answer
Correct Answer: B [Rice cultivation]
Notes:
The nitrogen-fixing capability of Azolla an aquatic pteridophyte has led to it being widely used as a biofertiliser for increasing the productivity of rice fields. When rice paddies are flooded in the spring, they can be inoculated with Azolla, which then quickly multiplies to cover the water, suppressing weeds. The rotting plant material releases nitrogen to the rice plants, increasing the rice yield equivalent to that produced by 30-60 kg N/ha.
39. Which one of the following animals is sanguinivorous?
[A] Fruit-fly
[B] Mosquito
[C] House-fly
[D] Snail
Show Answer
Correct Answer: B [Mosquito]
Notes:
The literal meaning of ‘sanguinivorous’ is someone subsisting on a diet of blood, or blood-sucking bats and animals. Mosquitoes belong to this category. Leech, female mosquitoes, vampire bats are other examples of Sanguivores.
40. Alveoli are balloon like structures within the ____:
[A] Heart
[B] Lungs
[C] Liver
[D] Kidney
Show Answer
Correct Answer: B [Lungs]
Notes:
Alveoli are the small balloon-like sacks of 200– 500 ?m diameter, making up a vital part of the respiratory zone of the lungs. Each alveolus (singular) plays an important role in letting oxygen and carbon dioxide move into and from the blood stream during inhalation and exhalation. he balloon-shaped alveoli cover approximately 70 square meter area within the lungs, with this wide surface area contributing towards a more efficient gas exchange.
