Biology (Railway)

Total Questions: 50

11. __________reproduces by multiple fission. [RRB ALP & Technician Exam, 10.08.2018 Shift-I]

(1) Yeast
(2) Plasmodium
(3) Planaria
(4) Rhizopus

Correct Answer: (2) Plasmodium

Solution:Plasmodium is a malarial parasite which reproduces both inside a mosquito and also in human being. It chooses multiple fission, asexual mode of reproduction for producing the cells. The specific reason behind the organism reproducing by multiple fission is that, it can divide itself into many cells at the same time inside the cyst during unfavorable conditions in the host.

12. Which of the following can inhabit the most inhabitable habitats like hot springs, deep sea, thermal vents and ice in Antarctica? [RRB ALP & Technician Exam, 10.08.2018 Shift-III]

(1) Bacteria
(2) Amoeba
(3) Euglena
(4) Viruses

Correct Answer: (1) Bacteria

Solution:Bacteria flourish inside hot geothermal vents, beneath the frigid ice covering Antarctica and under immense pressures at the bottom of the ocean. Many types of bacteria, if environmental conditions become unfavorable will go into a sort of dormant state, called an endospore.

13. In plants, the carbohydrates which are NOT used immediately are stored in the form of: [RRB ALP & Technician Exam, 10.08.2018 Shift-III]

(1) Amino acids
(2) Starch
(3) Fatty acids
(4) Fats

Correct Answer: (2) Starch

Solution:Animals store excess sugar in the form of glycogen. Plants store excess sugar in the form of starch. Starches are found mainly in grains, legumes tubers, and sugars are found in plants and fruits. Sugars are the smallest units of carbohydrates, and when they join together, they form starch.

14. ___________ is not an endocrine gland in humans. [RRB ALP & Technician Exam, 10.08.2018 Shift-III]

(1) The pituitary gland
(2) The pineal gland
(3) The adrenal gland
(4) The liver

Correct Answer: (4) The liver

Solution:Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct. The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands.

15. In which of the following tissues are the cells are living, elongated and irregularly thickened at the corners? [RRB ALP & Technician Exam, 13.08.2018 Shift-I]

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

Correct Answer: (4) Collenchyma

Solution:The cells of Collenchyma are living, elongated and irregularly thickened at the corners. There is very little intercellular space. The flexibility in plants is due to collenchyma. It allows easy bending in various parts of a plant (leaf, stem) without breaking and also provides mechanical support to plants.

16. Which of the following type of medicine is used to treat indigestion? [RRB ALP & Technician Exam, 13.08.2018 Shift-I]

(1) Sulfa drug
(2) Antihistamine
(3) Antibiotic
(4) Antacid

Correct Answer: (4) Antacid

Solution:An antacid is a substance which neutralizes stomach acidity and is used to relieve heartburn, indigestion or an upset stomach.Antacids contain alkaline ions that chemically neutralize stomach gastric acid, reducing damage and relieving pain.

17. What is the type of asexual reproduction in Amoeba? [RRB ALP & Technician Exam, 13.08.2018 Shift-I]

(1) Spore formation
(2) Binary fission
(3) Vegetative propagation
(4) Budding

Correct Answer: (2) Binary fission

Solution:Amoeba reproduces asexually by binary fission, a type of asexual reproduction in which the fully-grown parent cell splits into two halves. producing two new daughter cells. Binary fission is also common among organisms such as Bacteria, Paramecium, etc.

18. Which of the following is NOT a pollinating agent for cross pollination? [RRB ALP & Technician Exam, 13.08.2018 Shift-I]

(1) Water
(2) Animals
(3) Wind
(4) Plants

Correct Answer: (4) Plants

Solution:Cross-pollinations refers to the transfer of pollen from the male reproductive organ (an anther or a male cone) of one plant to the female reproductive organ (a stigma or a female cone) of another plant. Insects, animals and wind are the main agents of cross-pollination. Most plants reproduce by cross-pollination.

19. What is the name of the point at which the chromatids are attached in a chromosome? [RRB ALP & Technician Exam, 13.08.2018 Shift-III]

(1) Nucleosome
(2) Centromere
(3) Centrosome
(4) Gene

Correct Answer: (2) Centromere

Solution:Centromere is a structure in a chromosome that holds together the two chromatids (the daughter strands of a replicated chromosome). The centromere is the point of attachment of the kinetochore, a structure to which the microtubules of the mitotic spindle become anchored.

20. The female reproductive part of a flower is called: [RRB ALP & Technician Exam, 13.08.2018 Shift-III]

(1) Stamens
(2) Sepals
(3) Carpel
(4) Petals

Correct Answer: (3) Carpel

Solution:The stamens are male reproductive structures that produce pollen. The carpels are female reproductive structures that produce egg cells and protect a developing baby plant, or embryo. The three main parts of a carpel are the stigma, style, and ovary.

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