Biology (Railway)

Total Questions: 50

21. Which component of the blood transports food, CO₂ and nitrogenous waste? [RRB ALP & Technician Exam, 14.08.2018 Shift-I]

(1) WBCS
(2) Blood platelets
(3) RBCs
(4) Plasma

Correct Answer: (4) Plasma

Solution:Plasma is the liquid component of blood which transport food, carbon dioxide, nitrogenous waste, dissolved substances such as nutrients. electrolytes etc. It also carries blood components throughout the body. It makes up about 55% of the body's total blood volume.

22. Prostate gland is present below: [RRB ALP & Technician Exam, 14.08.2018 Shift-I]

(1) the urinary bladder
(2) the kidneys
(3) the scrotum
(4) the penis

Correct Answer: (1) the urinary bladder

Solution:Prostate gland is chestnutshaped reproductive organ, located directly beneath the urinary bladder in the male, which adds secretions to the sperm during the ejaculation of semen. The gland surrounds the urethra, the duct that serves for the passage of both urine and semen.

23. Some of the energy derived from the food we eat is stored in the form of: [RRB ALP & Technician Exam, 14.08.2018 Shift-III]

(1) Glucose
(2) Glycogen
(3) Pyruvic acid
(4) Amino acids

Correct Answer: (2) Glycogen

Solution:Glycogen is the major carbohydrate storage form in animals, and corresponds to starch in plants. In humans, glycogen is made and stored primarily in the cells of the liver and skeletal muscle.

24. Amphibian plants are placed in which of the following groups? [RRB ALP & Technician Exam, 14.08.2018 Shift-III]

(1) Pteridophyta
(2) Gymnosperms
(3) Bryophyta
(4) Thallophyta

Correct Answer: (3) Bryophyta

Solution:Amphibians are those organisms which live on both land and in water. Bryophytes are called amphibians of the plant kingdom because these plants though live on soil but they need water for sexual reproduction.

25. Which hormone is released from the testes? [RRB ALP & Technician Exam, 14.08.2018 Shift-III]

(1) Testosterone
(2) Thyroxin
(3) Insulin
(4) Estrogen

Correct Answer: (1) Testosterone

Solution:In men, testosterone is produced mainly in the testes, with a small amount made in the adrenal glands. It is involved in the development of male sex organs be fore birth, and the development of secondary sex characteristics at puberty, such as voice deepening, increased penis and testes size, and growth of facial and body hair,

26. Complete the following sentence with the most appropriate option. [RRB ALP & Technician Exam, 14.08.2018 Shift-III]

A disease always has _______.

(1) a cause
(2) a cure
(3) a doctor
(4) germs

Correct Answer: (1) a cause

Solution:A disease always has a cause.

27. Which part of the female reproductive system prepares Itself every month to receive and nurture the growing child? [RRB ALP & Technician Exam, 14.08.2018 Shift-III]

(1) Cervix
(2) Uterus
(3) Vagina
(4) Ovary

Correct Answer: (2) Uterus

Solution:The uterus prepares everymonth to receive a fertilized egg. This occurs as a result of the proliferation of the endometrial wall. If fertilization occurs, the fertilized egg embeds itself in the endometrial wall and is nourished. It then develops for the next nine months to a matured fetus. If fertilization does not occur, then the uterus sheds all the tissues. This is what forms the menses phase.

28. Growth hormones function: [RRB ALP & Technician Exam, 17.08.2018 Shift-I]

(1) rarely as growth promotors
(2) sometimes as growth promotors and sometimes as growth inhibitors
(3) always as growth inhibitors
(4) always as growth promotors

Correct Answer: (2) sometimes as growth promotors and sometimes as growth inhibitors

Solution:Growth hormones function sometimes as growth promoters and sometimes as growth inhibitors. Auxins, Gibberellins and Cytokinins function as growth promoters; Abscisic acid is a growth inhibitor. The growth regulators which are the organic substances and are required for the growth are called hormones.

29. Which permanent tissue makes a plant hard and stiff? [RRB ALP & Technician Exam, 17.08.2018 Shift-I]

(1) Collenchyma
(2) Sclerenchyma
(3) Parenchyma
(4) Aerenchyma

Correct Answer: (2) Sclerenchyma

Solution:Sclerenchyma is the simple permanent tissue that makes the plant hard and stiff. It provides mechanical strength to a plant. It consists of long and narrow dead cells. The cells of this tissue are thick-walled due to the deposition of lignin. There are no intercellular spaces due to presence of thickened wall.

30. The essential organs in a flower for reproduction are: [RRB ALP & Technician Exam, 17.08.2018 Shift-I]

(1) the sepal and stamen
(2) the stamen and pistil
(3) the sepal and petal
(4) the petal and pistil

Correct Answer: (2) the stamen and pistil

Solution:Basically, each flower consists of a floral axis upon which are borne the essential organs of reproduction (stamens and pistils) and usually accessory organs (sepals and petals). The androecium. or male parts of the flower. comprise the stamens, each of which consists of a supporting filament and an anther, in which pollen is produced. The gynoecium, or female parts of the flower. comprise the pistils, each of which consists of an ovary, with an upright extension, the style, on the top of which rests the stigma, the pollen-receptive surface.

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