31. Flightless birds belong to which of the following group?
[A] Ratites
[B] Neornithes
[C] Archaeornithes
[D] None of these
Show Answer
Correct Answer: A [Ratites]
Notes:
A ratite is one of a diverse group of mostly flightless, large, and long-legged birds of the infraclass Paleognathae. Twelve species of birds are classified as ratites, these species include the ostrich, emu, rhea, cassowary, and kiwi.
32. Which layer has the highest concentration of keratin and lamellar granules?
[A] Stratum Basale
[B] Stratum Spinosum
[C] Stratum Corneum
[D] Stratum Granulosum
Show Answer
Correct Answer: C [Stratum Corneum]
Notes:
The Stratum Corneum layer has the highest concentration of keratin and lamellar granules. Stratum Corneumlayer contains 25-30 layers of dead flattened keratinocytes
33. Which structure is part of the tectum?
[A] superior colliculus
[B] periaqueductal grey
[C] substantia nigra
[D] red nucleus
Show Answer
Correct Answer: A [superior colliculus]
Notes:
The superior colliculus structure is part of the tectum. The tectum forms the back of the midbrain and is formed by two paired rounded swellings, the superior and inferior colliculi.
34. Which of the following is an example of a basic nervous system function?
[A] Remembering a painful experience
[B] Sweating during a yoga class
[C] Feeling afraid of the dark
[D] Learning English as a second language
Show Answer
Correct Answer: B [Sweating during a yoga class]
Notes:
Sweating during a yoga class is an example of a basic nervous system function.
35. Myopia and hypermetropia can be corrected by __
[A] Concave and a plano-convex lens
[B] Concave and convex lens
[C] Convex and concave lens
[D] Plano-concave lens for both defects
Show Answer
Correct Answer: B [Concave and convex lens]
Notes:
Myopia and hypermetropia can be corrected by Concave and convex lens respectively.
36. 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.
37. The bioethanol is subjected to rectification to remove?
[A] Sugar
[B] Enzymes
[C] Yeast
[D] Impurities
Show Answer
Correct Answer: D [Impurities]
Notes:
The bioethanol is subjected to rectification to Remove Impurities. Alcohol is made by microbial fermentation, mostly from carbohydrates produced in sugar- or starchy plants such as corn, sugarcane, sweet sorghum, or lignocellulosic biomass known as bioethanol.
38. Lungs are the primary organs of ____:
[A] Digestion
[B] Respiration
[C] Constipation
[D] Perspiration
Show Answer
Correct Answer: B [Respiration]
Notes:
The lungs are the primary organs of respiration in humans and many other animals including a few fish and some snails. Their function in the respiratory system is to extract oxygen from the atmosphere and transfer it into the bloodstream, and to release carbon dioxide from the bloodstream into the atmosphere, in a process of gas exchange.
39. Seed dormancy is regulated by ____:
[A] Abscisic acid
[B] Indole acetic acid
[C] Ethylene
[D] Gibberellic acid
Show Answer
Correct Answer: A [Abscisic acid]
Notes:
The transition from dormancy to germination in seeds is a key physiological process during the lifecycle of plants. Abscisic acid (ABA) is the sole plant hormone known to maintain seed dormancy. It acts through a gene expression network involving the transcription factor Abscisic Acid Insensitive 3 (ABI3).
40. Which of the following cell organelle contains DNA apart from nucleus?
[A] Golgi Apparatus
[B] Mitochondria
[C] Cytoplasm
[D] Ribosome
Show Answer
Correct Answer: B [Mitochondria]
Notes:
The three organelles that contain DNA are the nucleus, mitochondria and chloroplasts. Mitochondria are unlike most organelles (with an exception of plant chloroplasts) in that they have their own set of DNA and genes that encode proteins. They are specialized structures unique to the cells of animals, plants and fungi.
