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290+ Biology-Physics-Chemistry (GK) Solved MCQs

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) , Uncategorized topics .

51.

What is blood pressure?

A. the pressure of blood on the heart muscle
B. the pressure of blood exerted on the walls of arteries and veins
C. the pressure of blood on the walls of veins only
D. the pressure of blood on the walls of arteries only
Answer» B. the pressure of blood exerted on the walls of arteries and veins
52.

Which one of following is called pace maker of the heart?

A. SA node
B. AV node
C. Chordae tendianae
D. AV septum
Answer» A. SA node
53.

Blood groups in man were discovered by

A. Mendel
B. Francis Nelson
C. S. Miller
D. Landsteiner
Answer» D. Landsteiner
54.

Rh factor was discovered by

A. William Harvey
B. Landsteiner
C. Robert Hook
D. C. De Duve
Answer» B. Landsteiner
55.

Rh factor is named after

A. Drosophila
B. a Monkey
C. a Rat
D. a Man
Answer» B. a Monkey
56.

Excretion means

A. removal of substances present in excess
B. formation of those substances that have some role in the body
C. removal of such substances that have never been part of the body
D. all of the above
Answer» A. removal of substances present in excess
57.

A mammal excretes nitrogen in the form of

A. ammonium ions
B. amino acids
C. urea
D. uric acid
Answer» C. urea
58.

Kidneys are not only organs of excretion. Their work is supplemented by

A. liver
B. heart
C. large intestine
D. skin
Answer» A. liver
59.

The basic unit of a vertebrate kidney is the

A. ureter
B. nephron
C. malpighian tubule
D. islets of Langerhans
Answer» B. nephron
60.

The two kidneys lie

A. at the level of ovaries
B. at the same level
C. left kidney at a higher level than the right one
D. right kidney at a higher level than the left one
Answer» C. left kidney at a higher level than the right one
61.

Function of glomerulus in mammalian kidney is

A. reasbsorption of salts
B. urine formation through blood filtration
C. urine collection
D. all of the above
Answer» B. urine formation through blood filtration
62.

The reabsorption of glucose in a nephron occurs in

A. loop of Henle
B. first half of proximal tubule
C. distal convoluted tubule
D. proximal part of collecting ducts
Answer» B. first half of proximal tubule
63.

Strongest cartilage is

A. hyaline cartilage
B. fibrous cartilage
C. elastic cartilage
D. none of the above
Answer» B. fibrous cartilage
64.

Striated muscles are found in

A. gallbladder
B. wall of bladder
C. leg muscles
D. lungs
Answer» C. leg muscles
65.

Strongest muscle in the body is present in

A. arm
B. jaw
C. thigh
D. neck
Answer» C. thigh
66.

Axial skeleton in man is made up of

A. 126 bones
B. 100 bones
C. 103 bones
D. 80 bones
Answer» D. 80 bones
67.

Skull of man is made up of

A. 10 bones
B. 22 bones
C. 30 bones
D. 24 bones
Answer» B. 22 bones
68.

Longest bone is that of

A. humerus
B. stapes
C. femur
D. radio-ulna
Answer» C. femur
69.

In man ribs are attached to

A. calvicle
B. ileum
C. sternum
D. scapula
Answer» C. sternum
70.

The smallest bone in mammals is

A. septomaxillary
B. dentary
C. femur
D. stapes
Answer» D. stapes
71.

The longest cell in the body of an animal is

A. osteocytes
B. neuron
C. chromatophores
D. lymph corpuscles
Answer» B. neuron
72.

Which cell stops dividing after birth?

A. glial cells
B. epithelium
C. liver
D. neuron
Answer» D. neuron
73.

The largest number of cells bodies of neurons in our body is found in

A. brain
B. spinal cord
C. tongue
D. retina
Answer» A. brain
74.

Which part of human brain is more developed in comparison of others?

A. cerebrum
B. cerebellum
C. optic lobes
D. medulla oblongata
Answer» A. cerebrum
75.

Which part of mammalian brain controls the muscular co-ordination?

A. cerebrum
B. cerebellum
C. corpus callosum
D. medulla oblongata
Answer» B. cerebellum
76.

There are how many pairs of spinal nerves in a human

A. 8
B. 12
C. 25
D. 31
Answer» D. 31
77.

There are how many pairs of cranial nerves in a human?

A. 8
B. 12
C. 25
D. 31
Answer» B. 12
78.

Pituitary gland is found in

A. around trachea
B. gonad
C. pancreas
D. brains
Answer» D. brains
79.

Which of the hormones is responsible for the emotional state such as fear and anger and causes rise of blood pressure and rate of heartbeat?

A. insulin
B. adrenaline
C. progesterone
D. thyroxine
Answer» B. adrenaline
80.

The main function of plasma membrane is to

A. maintain cell shape and size
B. control of all cellular activity
C. regulate the flow of materials into and out of the cell
D. store cell material
Answer» C. regulate the flow of materials into and out of the cell
81.

Function of a Centriole is

A. formation of spindle fibers
B. formation of nucleolus
C. initiation of cell division
D. formation of cell plate
Answer» A. formation of spindle fibers
82.

Functional activities of a cell are controlled by

A. nucleus
B. nucleolus
C. mitochondria
D. cytoplasm
Answer» A. nucleus
83.

Study of Algae is called

A. phycology
B. mycology
C. dendrology
D. mycology
Answer» A. phycology
84.

Which of the following is a non-poisonous snake?

A. cobra
B. python
C. viper
D. krait
Answer» B. python
85.

Which of the following diseases is caused by a virus?

A. typhoid
B. cholera
C. influenza
D. diphtheria
Answer» C. influenza
86.

DTP vaccine is given to infants to immunize them against

A. diphtheria, pneumonia and typhoid
B. diphtheria, whooping cough and tetanus
C. diarrhea, pneumonia and tuberculosis
D. diphtheria, whooping cough and typhoid
Answer» B. diphtheria, whooping cough and tetanus
87.

Jaundice is a disease of

A. kidney
B. pancreas
C. liver
D. duodenum
Answer» C. liver
88.

Male mosquito does not carry malarial parasite because:

A. it is too small to bite man.
B. it lacks the modified mouth parts
C. malarial parasites cannot reproduce in them.
D. female mosquito is more deadly
Answer» B. it lacks the modified mouth parts
89.

Continuous fever, headache, slow pulse, pain in the stomach, rose colored ashes are the major symptoms of

A. plague
B. typhoid
C. mumps
D. measles
Answer» D. measles
90.

Bark of which plant yields famous drug of malaria?

A. cinchona
B. quercus
C. betula
D. eucalyptus
Answer» A. cinchona
91.

Deficiency of vitamin C causes

A. rickets
B. beriberi
C. scurvy
D. night blindness
Answer» C. scurvy
92.

If there were no ultraviolet rays reaching the earth, human should suffer from deficiency of

A. fatty acids
B. essential amino acids
C. vitamin D
D. vitamin E
Answer» C. vitamin D
93.

Smog is a combination of

A. fire and water
B. smoke and fog
C. water and smoke
D. air and water
Answer» B. smoke and fog
94.

Sound becomes a hazardous noise pollution if its level is a above

A. 30 Db
B. 120 dB
C. 80 dB
D. 150 Db
Answer» C. 80 dB
95.

Maximum threat to the world is from (among the following)

A. global warming
B. ozone hole
C. water pollution
D. soil erosion
Answer» B. ozone hole
96.

Which of the following is the symbol of the metal that occurs in liquid form at ordinary temperature?

A. Na
B. Sn
C. Pb
D. Hg
Answer» D. Hg
97.

Which of the following is least compressible?

A. gas
B. liquid
C. solid
D. none of these
Answer» C. solid
98.

Which of the following is not a chemical change?

A. rusting of iron
B. converting water into steam
C. making curd from milk
D. heating coal
Answer» B. converting water into steam
99.

Atomicity of Phosphorous is

A. 1
B. 2
C. 4
D. 6
Answer» C. 4
100.

The number of atoms present in a molecule of an element is known as its

A. valency
B. atomicity
C. chemical Formula
D. symbol
Answer» B. atomicity

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