All Free Everyday Science MCQs with Answers

1091. Which of the following vitamin is known as Pyridoxine?

• A. Vitamin B-1
• B. Vitamin B-2
• C. Vitamin B-6
• D. Vitamin B-12

Explanation: Pyridoxine is vitamin B6, involved in amino-acid metabolism and nervous-system function. Vitamin B12 is cobalamin, while B1 and B2 are thiamine and riboflavin.

1092. Which of the following vitamin is known as Riboflavin?

• A. vitamin B-1
• B. vitamin B-2
• C. vitamin B-3
• D. vitamin B-6

Explanation: Riboflavin is vitamin B2, a component of coenzymes that help release energy from food. Vitamin B1 is thiamine and vitamin B6 is pyridoxine.

1093. Which of the following vitamin is known as Pantothenic acid?

• A. vitamin B-1
• B. vitamin B-2
• C. vitamin B-3
• D. vitamin B-5

Explanation: Pantothenic acid is vitamin B5, needed to make coenzyme A and metabolize carbohydrates, fats, and proteins. The name comes from a Greek word meaning “everywhere” because it occurs widely in foods.

1094. Which of the following vitamin is known as Biotin?

• A. vitamin B-3
• B. vitamin B-4
• C. vitamin B-5
• D. vitamin B-7

Explanation: Biotin is vitamin B7, a cofactor for enzymes involved in fatty-acid synthesis and other metabolic reactions. Vitamin B3 is niacin, while B5 is pantothenic acid.

1095. Chiken egg is composed of _______ cells?

• A. One cell
• B. 100 cells
• C. 1000 cells
• D. One million cells

Explanation: The chicken ovum, commonly called the egg cell, is a single cell; the egg white and shell are surrounding non-cellular structures. After fertilization, the single cell begins dividing into many cells.

1096. Which of the following vitamin is known as Cobalamin?

• A. vitamin B-1
• B. vitamin B-3
• C. vitamin B-9
• D. vitamin B-12Biological Sciences

Explanation: Cobalamin is the chemical name for vitamin B12, which is essential for red-blood-cell formation and normal nerve function. The other listed vitamins belong to different B groups.

1097. When WBCs greatly increased in number, they cause a disease called?

• A. Anaemia
• B. Leukaemia
• C. Haemophilia
• D. Diarrhoea

Explanation: Leukaemia is a cancer of blood-forming tissues that causes abnormal production and accumulation of white blood cells. Anaemia concerns reduced red blood cells or haemoglobin, while haemophilia affects clotting.

1098. Spinal card controls all ___________?

• A. Sexual activities
• B. Thinking activities
• C. Reflex activities
• D. none

Explanation: The spinal cord coordinates many rapid, automatic responses called reflexes, such as withdrawing the hand from a hot object. Thinking and conscious control are primarily functions of the brain.

1099. The back thigh muscles are also called__________?

• A. Gluteal
• B. Hamstring
• C. Sartorious
• D. Deltoid

Explanation: The hamstrings are the group of muscles at the back of the thigh that help bend the knee and extend the hip. The gluteal muscles are located mainly in the buttocks.

1100. Saliva helps in the digestion of?

• A. Starch
• B. Proteins
• C. Lipids
• D. Fats

Explanation: Salivary amylase begins the digestion of starch in the mouth by breaking it into smaller carbohydrates. Protein and fat digestion occurs mainly later in the stomach and small intestine.