Railway Exams (RRB) - General Science

Human Physiology, Genetics & Health question bank (Life Sciences (Biology))

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Q1.

Physics (Mechanics & Energy): A train of mass $2 \times 10^5\text{ kg}$ is accelerated from rest to $20\text{ m/s}$ in 'The Cell: Cell Organelles, Plant vs Animal Cells and Cell Division'. What is the total kinetic energy gained by the train?

(A)

$4 \times 10^7\text{ Joules}$ ($KE = \frac{1}{2} m v^2 = \frac{1}{2} \times 2 \times 10^5 \times 400$) (The Cell: Cell Organelles, Plant vs Animal Cells and Cell Division)

(B)

$2 \times 10^7\text{{ Joules}}$

(C)

$8 \times 10^7\text{{ Joules}}$

(D)

$4 \times 10^6\text{{ Joules}}$

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Q2.

Life Sciences (Physiology): Which part of the human brain controls involuntary life-support activities such as breathing, heart rate, and blood pressure in 'The Cell: Cell Organelles, Plant vs Animal Cells and Cell Division'?

(A)

Medulla oblongata (Hindbrain) (The Cell: Cell Organelles, Plant vs Animal Cells and Cell Division)

(B)

Cerebrum

(C)

Cerebellum

(D)

Hypothalamus

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