31. The cerebellum of which one of the following animals is provided with lateral lobes and arborvitae?
[A] Reptilia
[B] Mammals
[C] Birds
[D] Amphibia
Show Answer
Correct Answer: B [Mammals]
Notes:
The cerebellum is a major feature of the hindbrain of all vertebrates.
32. Gelatin is a protein made from __.
[A] Keratin
[B] Elastin
[C] Collagen
[D] All of the above
Show Answer
Correct Answer: C [Collagen]
Notes:
Gelatin is a protein made from Collagen. Collagen is one of the materials that make up cartilage, bone, and skin. Gelatin is used for the preparation of foods, cosmetics, and medicines.
33. Usually, a decrease in the amount of oxygen in the blood will result in ___ of the skin.
[A] Cyanosis
[B] Jaundice
[C] Paleness
[D] Flushing
Show Answer
Correct Answer: A [Cyanosis]
Notes:
Usually, a decrease in the amount of oxygen in the blood will result in Cyanosis of the skin.
34. The three major types of muscles in the body are:
[A] Smooth muscle, sports muscles, and skeletal muscles
[B] Smooth muscle, cardiac muscle, and skeletal muscle
[C] Smooth muscle, running muscle, and face muscles
[D] Smooth muscle, flexible muscle, and strength muscle
Show Answer
Correct Answer: B [Smooth muscle, cardiac muscle, and skeletal muscle]
Notes:
The three major types of muscles in the body are Smooth muscle, cardiac muscle, and skeletal muscle
35. The branch of biology that studies the immune system in all organisms.
[A] Botany
[B] Microbiology
[C] Immunology
[D] Biotechnology
Show Answer
Correct Answer: C [Immunology]
Notes:
Immunology is a branch of biology that studies the immune system in all organisms.
36. Approximately how many pairs are there in the human genome?
[A] 6 billion base pairs
[B] 5 billion base pairs
[C] 3 billion base pairs
[D] 4 billion base pairs
Show Answer
Correct Answer: C [3 billion base pairs]
Notes:
Approximately 3 billion base pairs are there in the human genome. The complete set of nucleic acid sequences for humans encoded as DNA within 23 chromosome pairs in the cell nucleus and a small DNA molecule found within individual mitochondria is called the human genome.
37. Which protein helps in DNA winding?
[A] Helicase
[B] Histone
[C] Lipase
[D] Cellulase
Show Answer
Correct Answer: B [Histone]
Notes:
A protein that provides structural support to a chromosome is called histone.
38. Which of the following is not a connective tissue?
[A] Cardiac Muscle
[B] Areolar Tissue
[C] Compact Bone
[D] Adipose Tissue
Show Answer
Correct Answer: A [Cardiac Muscle]
Notes:
Connective tissue is a group of tissues in the body that maintain the form of the body and its organs and provide cohesion and internal support. Bone, ligaments, tendons, cartilage, and adipose (fat) tissue are examples of connective tissue. Cardiac muscle is an example of muscle tissue. It is so named because it is found in the heart.
39. Which of the following cell organells are present only in plant cell?
[A] Lysosomes
[B] Plastids
[C] Mitochondria
[D] Cell membrane
Show Answer
Correct Answer: B [Plastids]
Notes:
The plastid is a major double-membrane organelle found in the cells of plants. Plastids are the site of manufacture and storage of important chemical compounds used by the cell. Plastids often contain pigments used in photosynthesis, and the types of pigments present can change or determine the cell’s colour.
40. People with Downs syndrome invariably affected by _____:
[A] Alzheimers disease
[B] Huntingtons disease
[C] Brain haemorrhage
[D] Meningitis
Show Answer
Correct Answer: A [Alzheimers disease]
Notes:
The best-known and most common chromosome abnormality in humans is Down’s syndrome, (Trisomy of 21st pair of chromosome). Down’s syndrome individuals also almost invariably develop Alzheimer’s disease, a form of dementia that is fairly common among the elderly people. People with Down’s syndrome develop this disease in their fourth or fifth decade of life, much sooner than other people. These people are also characterized by presence of webbed neck, Plamers crease, very broad forehead, round face and forked tongue.
