Explore topic-wise MCQs in Science.

This section includes 6820 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.

1051.

How much energy is found in one gram of fat?

A. 4 grams calories
B. 6 kcal
C. 9 kcal
D. 2 . 25 kcal
Answer» D. 2 . 25 kcal
1052.

Which medicine is obtained from the bark of the plant?

A. Aconite
B. Ephedrine
C. belladonna
D. quinine
Answer» E.
1053.

Is it a symptom of mental fatigue?

A. rapid and difficult breathing
B. body pain
C. abnormal behavior
D. lack of focus
Answer» E.
1054.

What does the pancreas secrete?

A. insulin
B. pitta essence
C. digestive essence
D. saliva
Answer» B. pitta essence
1055.

ECG is used to detect which disease?

A. Brain
B. heart
C. Kidney
D. Lungs
Answer» C. Kidney
1056.

A color blind person is suffering from the disease Protanopia, it means that he . .

A. can't see red
B. can't see green
C. can't see blue
D. can't see purple
Answer» B. can't see green
1057.

What is the cause of cold?

A. bacteria (bacteria)
B. Fungus
C. virus
D. protozoa
Answer» D. protozoa
1058.

What is the disease caused due to deficiency of Vitamin B in food?

A. berry - berry
B. pneumonia
C. gout
D. paralysis
Answer» B. pneumonia
1059.

Which group of vitamins is water soluble?

A. A , D
B. D, E
C. A , K
D. C , B
Answer» E.
1060.

Where does the process of digestion start in the human digestive system?

A. Pharynx
B. main cavity
C. gut
D. stomach
Answer» C. gut
1061.

Between whom there is intense competition for food, light and space?

A. Closely related species that grow in the same habitat.
B. Closely related species that grow in different habitats.
C. of distant species
D. Which of the distant species grows in different habitats?
Answer» B. Closely related species that grow in different habitats.
1062.

How much blood does a normal adult person have?

A. 5 - 6 liters
B. 3 - 4 liters
C. 8 - 10 liters
D. 10 - 12 liters
Answer» B. 3 - 4 liters
1063.

Who is affected by meningitis?

A. kidney
B. liver
C. heart
D. Brain
Answer» E.
1064.

What is the diameter of human white blood cells?

A. 0 . 007 mm
B. 0 . 7 mm
C. 0 . 07 mm
D. 0 . 0007mm
Answer» B. 0 . 7 mm
1065.

How many essential amino acids are there in the human body?

A. 15
B. 20
C. 30
D. 40
Answer» C. 30
1066.

Where is growth hormone secreted?

A. thyroid
B. Adrenal
C. reproductive organ
D. pituitary
Answer» E.
1067.

What is the common tract (organ) of swallowing food and respiration?

A. pharynx
B. Pharynx
C. gloris
D. larynx
Answer» B. Pharynx
1068.

How many molecules of ATP are formed as a result of complete oxidation of glucose?

A. 2
B. 28
C. 38
D. 48
Answer» D. 48
1069.

Who performs the function ofblood bankin the human body?

A. spleen
B. lung
C. heart
D. liver
Answer» B. lung
1070.

Apoh is used to complete that action?

A. Lungs
B. heart
C. liver
D. kidney
Answer» E.
1071.

In the human body, the maximum absorption of food through the blood is through?

A. liver
B. stomach
C. small intestine
D. large intestine
Answer» D. large intestine
1072.

What is the middle layer of the human heart called?

A. Epicardium
B. Pericardium
C. Myocardium
D. Endocardium
Answer» D. Endocardium
1073.

How many times does a human breathe in a minute?

A. 16 - 18
B. 20 - 25
C. 25 - 30
D. 70 - 72
Answer» B. 20 - 25
1074.

test tube in infants. . .

A. Fertilization and development of egg takes place in test tubes
B. Fertilization of the egg takes place in the test tube and development in the uterus
C. Fertilization of the egg occurs in the uterus and development in the test tubes
D. The development of the egg takes place in the test tube and without fertilization
Answer» C. Fertilization of the egg occurs in the uterus and development in the test tubes
1075.

Approximately what is the amount of (CO₂) in the air we exhale?

A. 4 percent
B. 8 percent
C. 12 percent
D. 16 percent
Answer» B. 8 percent
1076.

What is male sex hormone?

A. adrenaline
B. progesterone
C. Testosterone
D. Testosterone FSH
Answer» D. Testosterone FSH
1077.

From which gland are life-saving hormones secreted?

A. adrenal
B. pituitary
C. thyroid
D. all of the above
Answer» B. pituitary
1078.

The most important gland of the human body is?

A. thyroid
B. pituitary
C. pancreas
D. liver
Answer» C. pancreas
1079.

What is the amount of oxygen in the exhaled air in human beings?

A. 14 percent
B. 16 percent
C. 20 percent
D. 25 percent
Answer» C. 20 percent
1080.

On which part of the eye is the image of the object formed?

A. pupil
B. cornea
C. iris
D. retina
Answer» E.
1081.

What is the smallest bone in the body?

A. Nails
B. of jaw
C. steppes
D. nose
Answer» D. nose
1082.

The smallest gland in the human body is?

A. liver
B. thyroid
C. pituitary
D. salivary gland
Answer» D. salivary gland
1083.

Where is pitta stored?

A. in gall bladder
B. in the duodenum
C. in the liver
D. in the spleen
Answer» B. in the duodenum
1084.

If a man has blood group AB and woman has blood group B, then which of the following blood group cannot be present in their children?

A. AWAY
B. B
C. A
D. O
Answer» E.
1085.

The largest gland in man is?

A. pancreatic
B. liver
C. gall bladder
D. kidney
Answer» C. gall bladder
1086.

Not a part of the digestive system?

A. liver
B. gall bladder
C. cornea
D. gut
Answer» D. gut
1087.

The retina present in the human eye is present for the differentiation of colors.

A. cones
B. rods
C. cornea
D. choroid
Answer» B. rods
1088.

in human body. . . . . is it stapes?

A. the largest gland
B. smallest bone
C. largest bone
D. smallest gland
Answer» C. largest bone
1089.

What is the function of a pace maker?

A. regulation of urine output
B. regulation of digestion
C. start beating heart
D. start breathing
Answer» D. start breathing
1090.

Insulin is a type. . .

A. Salt
B. hormones
C. Enzyme
D. Vitamins
Answer» C. Enzyme
1091.

In which part of the breast are papillae muscles found?

A. karna pallava
B. ventricles
C. eye
D. atrium
Answer» C. eye
1092.

The blood inside the human body does not coagulate due to the presence of which of the following?

A. hemoglobin
B. Heparin
C. fibrinogen
D. none of these
Answer» C. fibrinogen
1093.

Pepsin is a . . .

A. Enzyme
B. hormones
C. Vitamins
D. minerals
Answer» B. hormones
1094.

What is pregnancy in healthy women?

A. 6 months
B. 7 months
C. 8 months
D. 9 months
Answer» E.
1095.

In which part of the cell does the conversion of food into energy take place?

A. nucleus
B. lysosomes
C. in the ribosome
D. mitochondria
Answer» E.
1096.

R in the human body at high altitude. b. C . . . . . . . .

A. will increase in size
B. will decrease in size
C. will increase the number of
D. will decrease the number of
Answer» D. will decrease the number of
1097.

The combination of two gametes is called?

A. fertilization
B. enhancement
C. regeneration
D. paragam
Answer» B. enhancement
1098.

What is female reproductive hormone?

A. estrogen
B. progesterone
C. relaxin
D. all of the above
Answer» E.
1099.

Where is the humerus bone found?

A. Thigh
B. Shin
C. upper arm
D. front arm
Answer» D. front arm
1100.

Which gland is responsible for insulin production?

A. pituitary
B. pineal
C. relaxin
D. pancreatic
Answer» E.