Practice 300+ Biology MCQs (Free multiple choice questions)

Online Interview MCQs Questions

MCQss Free (mcqs practice test ) is a Free Multiple Choice Questions Answers platform. These online interview questions are designed to help students and individuals who are preparing for exams, tests, or job interviews. 

300+ Biology Solved MCQs Test (multiple choice questions)

Practice our Free more than 300 Biology MCQs (online interview test) and see how sharp is your knowledge of Biology. The website has a user-friendly interface, and visitors can navigate through various categories of biology MCQs such as cell biology, genetics, ecology, evolution, and more. 



Here are only thirty multiple choice questions related to biology along with their answers 

Which of the following is the smallest unit of life?

a. Cell

b. Molecule

c. Atom

d. Tissue

Answer: a. Cell


Which of the following is not a type of RNA?

a. Messenger RNA (mRNA)

b. Transfer RNA (tRNA)

c. Ribosomal RNA (rRNA)

d. Deoxyribonucleic acid (DNA)

Answer: d. Deoxyribonucleic acid (DNA)


What is the process by which plants produce their food called?

a. Respiration

b. Photosynthesis

c. Fermentation

d. Digestion

Answer: b. Photosynthesis


What is the powerhouse of the cell?

a. Nucleus

b. Mitochondria

c. Golgi Apparatus

d. Ribosome

Answer: b. Mitochondria


What is the smallest bone in the human body?

a. Stapes

b. Malleus

c. Incus

d. Phalanges

Answer: a. Stapes


What is the name of the largest artery in the human body?

a. Pulmonary artery

b. Aorta

c. Coronary artery

d. Brachial artery

Answer: b. Aorta


What is the name of the hormone that regulates blood sugar levels in the body?

a. Insulin

b. Glucagon

c. Adrenaline

d. Cortisol

Answer: a. Insulin


What is the process by which the body breaks down food into smaller molecules called?

a. Digestion

b. Respiration

c. Circulation

d. Excretion

Answer: a. Digestion


Which of the following is a male reproductive cell?

a. Ovum

b. Zygote

c. Sperm

d. Blastocyst

Answer: c. Sperm


What is the name of the process by which a cell divides into two identical daughter cells?

a. Meiosis

b. Mitosis

c. Binary fission

d. Replication

Answer: b. Mitosis


Which of the following is not a function of the liver?

a. Production of bile

b. Regulation of blood sugar levels

c. Production of insulin

d. Detoxification of harmful substances

Answer: c. Production of insulin


Which of the following is not a type of muscle tissue?

a. Skeletal

b. Cardiac

c. Smooth

d. Nervous

Answer: d. Nervous


What is the name of the process by which plants and animals exchange gases with the environment?

a. Respiration

b. Circulation

c. Photosynthesis

d. Transpiration

Answer: a. Respiration


What is the name of the pigment that gives skin its color?

a. Hemoglobin

b. Melanin

c. Carotene

d. Chlorophyll

Answer: b. Melanin


What is the name of the largest organ in the human body?

a. Brain

b. Skin

c. Heart

d. Liver

Answer: b. Skin


Which of the following is not a type of blood cell?

a. Red blood cell

b. White blood cell

c. Platelet

d. Lymphocyte

Answer: d. Lymphocyte


Which of the following is not a type of connective tissue?

a. Cartilage

b. Bone

c. Nerv

Answer: c. Nerve


What is the name of the process by which plants bend towards a source of light?

a. Phototropism

b. Gravitropism

c. Hydrotropism

d. Thigmotropism

Answer: a. Phototropism


Which of the following is not a function of the respiratory system?

a. Exchange of gases

b. Regulation of body temperature

c. Voice production

d. Acid-base balance

Answer: b. Regulation of body temperature


Which of the following is the most abundant gas in the Earth's atmosphere?

a. Carbon dioxide

b. Oxygen

c. Nitrogen

d. Methane

Answer: c. Nitrogen


What is the name of the structure that connects muscles to bones?

a. Tendon

b. Ligament

c. Cartilage

d. Synapse

Answer: a. Tendon


Which of the following is not a type of bone in the human body?

a. Long bone

b. Flat bone

c. Short bone

d. Red bone

Answer: d. Red bone


What is the name of the process by which an organism develops from a fertilized egg?

a. Metamorphosis

b. Differentiation

c. Embryogenesis

d. Reproduction

Answer: c. Embryogenesis


Which of the following is not a type of tissue in the human body?

a. Epithelial

b. Connective

c. Muscle

d. Neuron

Answer: d. Neuron


What is the name of the process by which cells convert glucose into energy?

a. Glycolysis

b. Krebs cycle

c. Electron transport chain

d. Fermentation

Answer: a. Glycolysis


Which of the following is not a function of the nervous system?

a. Regulation of body temperature

b. Control of body movements

c. Processing and interpretation of sensory information

d. Coordination and control of body functions

Answer: a. Regulation of body temperature


What is the name of the hormone that regulates sleep and wakefulness?

a. Melatonin

b. Adrenaline

c. Estrogen

d. Testosterone

Answer: a. Melatonin


Which of the following is not a type of gland in the human body?

a. Endocrine gland

b. Exocrine gland

c. Nervous gland

d. Mixed gland

Answer: c. Nervous gland


What is the name of the process by which a sperm and ovum fuse to form a zygote?

a. Fertilization

b. Implantation

c. Ovulation

d. Menstruation

Answer: a. Fertilization


Which of the following is not a type of protein?

a. Enzyme

b. Hormone

c. Antibody

d. Carbohydrate

Answer: d. Carbohydrate


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