1. The enzyme Nitrite reductase has which of the elements as its constituent ?
[A] Molybdenum
[B] Copper
[C] Iron
[D] Zinc
Show Answer
Correct Answer: A [Molybdenum]
Notes:
Nitrite reductase refers to any of several classes of enzymes that catalyze the reduction of nitrite. They are enzymes that catalyze reduction of nitrate to nitrite using a molybdenum cofactor.
2. In which parts of the body glycogen is stored mainly ?
[A] cartilages & bones
[B] liver and muscles
[C] Spleen
[D] Lungs
Show Answer
Correct Answer: B [liver and muscles]
Notes:
Glycogen is stored mainly in liver and muscles. It is a multibranched polysaccharide of glucose. It serves as a form of energy storage in animals, fungi, and bacteria.
3. A plant belonging to which of the following groups would show least adaptation to marine water?
[A] Pteridophytes
[B] Gymnosperms
[C] Angiosperms
[D] Bryophytes
Show Answer
Correct Answer: C [Angiosperms]
Notes:
A plant belonging to angiosperms group would show least adaptation to marine water. Angiosperms are vascular plants that have stems, roots, and leaves.
4. Which among the following is homologous to a human arm?
[A] Wing of an insect
[B] Leg of a lobster
[C] Lateral Fin of a whale
[D] Front leg of a reptile
Show Answer
Correct Answer: C [ Lateral Fin of a whale]
Notes:
The lateral fin of the whale consists of the same bones as a human’s arm, the radius, ulna, and humerus. These structures are considered to be homologous because the underlying structure is similar and, therefore, humans and whales share a common ancestor. The lobster’s leg, the reptile’s front leg, and the insect’s wing are analogous to the human’s arm. They have a common function but no common structure, and they do not share a common ancestor.
5. Which of the following can be checked by doctors with the help of Pulse reading?
[A] Temperature
[B] Heart beat
[C] Blood pressure
[D] Respiration rate
Show Answer
Correct Answer: B [Heart beat]
Notes:
Pulse rate is the number of heart beats per minute. The resting pulse rate for an average adult is between 60 and 80 beats per minute. It can go up to 130–150 beats per minute when you’re exercising because the body needs more oxygen. The study of the pulse is known as sphygmology.
6. Genetic code is made up by the four-letter alphabet forming the pairs?
[A] A—C, C—A, T—G, G—T
[B] A—G, G—A, C—A, T—C
[C] T—G, G—T, A—C, C—A
[D] A—T, T—A, C—G, G—C
Show Answer
Correct Answer: D [A—T, T—A, C—G, G—C]
Notes:
The four letters designating these bases (A, G, C, and T) are the alphabet of the genetic code. Each rung of the DNA molecule is contains a combination of two of these letters, one jutting out from each side. In this genetic code, A always combines with T, and C with G to make what is called a base pair.
7. A man whose blood group is not known meets with a serious accident and needs blood transfusion immediately. Which one of the blood groups mentioned below and readily available in the hospital will be safe for transfusion?
[A] O, Rh-
[B] O, Rh+
[C] AB, Rh-
[D] AB, Rh+
Show Answer
Correct Answer: B [O, Rh+]
Notes:
There is no A and B antigen on RBC of “O– ”bloodgroup , So O, Rh– is known as universal blood donor.
8. Deficiency in which among the following leads to goitre?
[A] Iodine
[B] Calcium
[C] Phosporous
[D] Zinc
Show Answer
Correct Answer: A [Iodine]
Notes:
Goitre is a disorder caused due to the deficiency of iodine. Malfunction of thyroid gland leads to goitre (Swelling of neck). It is due to the bulge of the thyroid gland.
9. Which of the following virus has its envelope from the host cell nucleus?
[A] Paramyxoviruses
[B] Retroviruses
[C] Orthomyxoviruses
[D] Herpesviruses
Show Answer
Correct Answer: D [Herpesviruses]
Notes:
The Herpesviridae are a large family of DNA viruses. It causes infections and some diseases in animals, including humans. Herpes viruses are divided into three groups: α herpesviruses, herpes simplex virus types 1 and 2.
10. Virus size is usually measured by__?
[A] centimeters
[B] micrometers
[C] nanometers
[D] millimeters
Show Answer
Correct Answer: C [nanometers]
Notes:
Virus size is usually measured by nanometers. Most viruses vary in diameter from 20 nanometers (nm; 0.0000008 in) to 250–400 nm. The largest viruses have a diameter of about 500 nm and a length of about 700–1,000 nm.
