31. Urine is formed in the nephron and which of the following steps are involved?
[A] Glomerular Filtration
[B] Tubular Reabsorption
[C] Secretion
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Urine is formed in the nephron and Glomerular Filtration, Tubular Reabsorption, and Secretion steps are involved in it.
32. The human alimentary canal runs from the mouth to the anus and is approximately how many meters long?
[A] 4 m
[B] 15 m
[C] 9 m
[D] 1 m
Show Answer
Correct Answer: C [9 m]
Notes:
The human alimentary canal runs from the mouth to the anus and is approximately 9 meters long.
33. The elastic tissue which connects the cauda epididymis to the scrotal sac is called __.
[A] Caput epididymis
[B] Scrotal ligament
[C] Gubernaculum
[D] Tendinous cord
Show Answer
Correct Answer: C [Gubernaculum]
Notes:
Connects the lower pole of the gonad and epididymis to the future inguinal canal is called the Gubernaculum.
34. Which of the following female reproductive organs produces female hormones?
[A] Uterus
[B] Fallopian Tubes
[C] Ovaries
[D] None of these
Show Answer
Correct Answer: C [Ovaries]
Notes:
Ovaries are the female reproductive organs that are responsible for producing various hormones and produce female gametes.
35. The tendency of an offspring to resemble its parent is known as ___
[A] Variation
[B] Heredity
[C] Resemblance
[D] Inheritance
Show Answer
Correct Answer: B [Heredity]
Notes:
The genetic heritage passed down by our biological parents is known as Heredity.
36. What is the renewable energy source produced by the breakdown of organic matter by some bacteria under anaerobic conditions called?
[A] Bioethanol
[B] Biogas
[C] Biofertilizer
[D] None of these
Show Answer
Correct Answer: B [Biogas]
Notes:
The renewable energy source produced by the breakdown of organic matter by some bacteria under anaerobic conditions is called Biogas. This is a mixture of methane, hydrogen, and carbon dioxide.
37. Which of the following initiates replication in DNA?
[A] DNA ligase
[B] Origin of replication
[C] Termination sequences
[D] Histone proteins
Show Answer
Correct Answer: B [Origin of replication]
Notes:
A chromosome contains the specific DNA sequence, called the origin of replication, which is responsible for initiating replication. DNA ligase is an enzyme. It helps in binding the DNA. Termination sequence is the site where DNA replication ends while histones are the proteins around which DNA is wound.
38. Which inhibits the translation of mRNA?
[A] increase
[B] knock out
[C] clearing
[D] silencing
Show Answer
Correct Answer: D [silencing]
Notes:
The one that inhibits the translation of mRNA is silencing. It controls the expression of a gene by inhibiting its expression.
39. Morphology of Chromosomes can be best studied at ___:
[A] Interphase
[B] Prophase
[C] Metaphase
[D] Zygotene
Show Answer
Correct Answer: C [Metaphase]
Notes:
The morphology of the chromosomes can be distinctly studied at metaphase stage of cell division because at this stage chromosomes are in highly condensed state (25 times of orginal size) and become thicker and well arranged.
40. Which of the following are warm-blooded animals?
[A] Whales
[B] Draco
[C] Alytes
[D] Whale Sharks
Show Answer
Correct Answer: A [Whales]
Notes:
Animals, such as mammals and birds, that maintain a constant body temperature regardless of the temperature of the surroundings are called warm blooded. These include birds and mammals. Whales are aquatic mammals hence, being mammal, they are warm blooded. The have a thick layer of fats called blubber underneath their skin to maintain temperature even in cold water of oceans.
