Mcqs on biology [General Biology]

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Mcqs on Biology are often used in standardized tests such as the SAT, ACT, GRE, and MCAT. They are also frequently used in classroom assessments and quizzes. Mcqs can be particularly useful in biology as they allow for a quick and efficient assessment of a student’s knowledge and understanding of complex biological concepts. Check the below mcqs on biology to check your biology knowledge

Q1. The basic unit of all living organisms is 

(a) A cell

(b) A molecule of glucose

(c) A set of proteins

(d) A drop of blood

(a) A cell

Q2. Fungi are always

(a) Autotrophic 

(b) Saprophytic

(c) Parasitic

(d) Heterotrophic

(d) Heterotrophic

Q3. Which of the following is a parasitic plant?   (a) Marchantia

(b) Kelp

(c) Mushroom

(d) Pteris

(c) Mushroom

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Q4. Which of the following is an amphibian?   (a) Whale

(b) Turtle

(c) Cow

(d) Frog

(d) Frog

Q5. A cell cycle consists of 

(a) Interphase and mitosis

(b) GI, the Sphase, and G2 

(c) Prophase, metaphase, anaphase and telophase 

(d) Mitosis and meiosis

(a) Interphase and mitosis

Q6. Gene is 

(a) A segment of DNA or functional RNA

(b) A segment of DNA and histone 

(c) A segment of DNA, RNA and histone  

(d) All of the above

(a) A segment of DNA or functional RNA

Q7. The human cell contains

(a) 44 chromosomes 

(b) 48 chromosomes 

(c) 23 chromosomes

(d) 46 chromosomes

(d) 46 chromosomes

Q8. The only molecule in the living world that can  replicate itself is 

(a) RNA

(b) DNA

(c) Both DNA and RNA 

(d) Neither DNA nor RNA

(b) DNA

Q9. How many different kinds of amino acids are  specified by the genetic code? 

(a) 15 

(b) 20

(c) 12 

(d) 200

(b) 20

Q10. Deficiency of iron in human diet causes   (a) Goitre

(b) Anaemia

(c) Scurvy

(d) Rickets

(b) Anaemia

Q11. Enzymes help in

(a) Respiration

(b) Reproduction

(c) Immune system

(d) Digestion of food

(d) Digestion of food

Q12. Food is normally digested in the

(a) Large intestines

(b) Stomach  

(c) Small intestines

(d) Liver

(c) Small intestines

Q13. The process in which light energy converted into chemical energy is called 

(a) Respiration

(b) Photosynthesis

(c) Transpiration

(d) None of these

(b) Photosynthesis

Q14. Photosynthesis in plants takes place faster in 

(a) Yellow light

(b) White light

(c) Red light

(d) Darkness

(b) White light

Q15. Which of the following Plants have while animals lack it.

(a) Starch

(b) Cellulose

(c) Protein

(d) Fat

(b) Cellulose

Q16. Which of the following blood groups  is called a universal donor? 

(a) O

(b) AB 

(c) A  

(d) B

(a) O

Q17. blood in humans contain_____________ percentage  of plasma.

(a) 35%

(b) 40%

(c) 50%  

(d) 65%

(d) 65%

Q18. Name the smallest living cell 

(a) bacterium 

(b) bread mould  

(c) mycoplasma

(d) virus

(c) mycoplasma

Q19. Which of the following tissue is involved in the transport of food  material in plants

(a) parenchyma 

(b) phloem

(c) sclerenchyma 

(d) xylem

(b) phloem

Q20. Which of the following disease not transmitted by house – fly  

(a) cholera  

(b) enteric fever  

(c) dengue fever  

(d) dysentery

(d) dysentery

Q21. The diaphragm assists in 

(a) digestion   

(b) respiration   

(c) circulation of blood  

(d) excretion of waste

(b) respiration

Q22. Which of the following helps us in  protecting from infection?

(A) R.B.C

(B) W.B.C

(C) Blood Plasma  

(D) Haemoglobin

(B) W.B.C

Q22. The main function of white blood  cells is

(A) Transport of oxygen  

(B) Transport of carbon dioxide  

(C) To develop resistance towards  disease. (D) None of the above

(C) To develop resistance towards  disease

Q23. Which light is most effective in  photosynthesis?

(A) Red

(B) Blue  

(C) Green 

(D) Violet

(A) Red

Q24. The largest gland in human body is

(A) Pancreas

(B) Liver

(C) Salivary gland

(D) Adrenal gland

(B) Liver

Q25. What is estrogen? 

(A) Bone 

(B) Hormone

(C) Enzyme 

(D) Vitamin

(B) Hormone

Q26 Which is the smallest gland in the  human body? 

(A) Adrenal 

(B) Thyroid  

(C) Pancreas 

(D) Pituitary

(D) Pituitary

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Mcqs on biology class 10

Which of the following is the basic structural and functional unit of life?

a) Cell

b) Tissue

c) Organ

d) Organism

Answer: a) Cell

What is the process by which green plants convert sunlight, carbon dioxide, and water into glucose and oxygen?

a) Photosynthesis

b) Respiration

c) Fermentation

d) Transpiration

Answer: a) Photosynthesis

Which of the following is responsible for carrying oxygen to different parts of the body?

a) Red blood cells

b) White blood cells

c) Platelets

d) Plasma

Answer: a) Red blood cells

Which of the following is a vestigial organ in the human body?

a) Appendix

b) Liver

c) Kidney

d) Stomach

Answer: a) Appendix

Which of the following is responsible for the sense of vision in humans?

a) Retina

b) Cochlea

c) Taste buds

d) Olfactory epithelium

Answer: a) Retina

Which of the following is a non-communicable disease?

a) Influenza

b) Tuberculosis

c) Malaria

d) Diabetes

Answer: d) Diabetes

Which of the following is responsible for the production of antibodies in the body?

a) Lymph nodes

b) Spleen

c) Thymus gland

d) Bone marrow

Answer: d) Bone marrow

What is the largest organ in the human body?

a) Liver

b) Brain

c) Skin

d) Heart

Answer: c) Skin

Which of the following is responsible for the production of sound in the human voice box?

a) Larynx

b) Trachea

c) Pharynx

d) Epiglottis

Answer: a) Larynx

Which of the following is the largest gland in the human body?

a) Thyroid gland

b) Adrenal gland

c) Pituitary gland

d) Liver

Answer: d) Liver

What is the difference between DNA and RNA?

DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are both nucleic acids involved in genetic information. DNA is typically double-stranded, while RNA is single-stranded. DNA carries the genetic instructions for the development and functioning of organisms, while RNA is responsible for protein synthesis and gene expression.

How does natural selection work?

Natural selection is a key mechanism in evolution. It occurs when certain traits or variations within a population provide individuals with a reproductive advantage, enabling them to survive and reproduce more successfully. Over time, these advantageous traits become more common in the population, leading to adaptation and the formation of new species.

What is the difference between mitosis and meiosis?

Mitosis and meiosis are processes of cell division. Mitosis is the division of a cell into two identical daughter cells, each with the same number of chromosomes as the parent cell. It is essential for growth, repair, and asexual reproduction. Meiosis, on the other hand, involves two divisions and results in the formation of four genetically distinct daughter cells with half the number of chromosomes as the parent cell. Meiosis is crucial for sexual reproduction and creates genetic diversity.

What is the role of enzymes in biological processes?

Enzymes are proteins that act as biological catalysts, speeding up chemical reactions within cells. They facilitate various biochemical processes, such as digestion, metabolism, and DNA replication. Enzymes lower the activation energy required for a reaction to occur, enabling it to happen more efficiently and rapidly.

What is the structure and function of the cell membrane?

The cell membrane, also known as the plasma membrane, is a selectively permeable barrier surrounding the cell. It consists of a phospholipid bilayer with embedded proteins. The phospholipids form a fluid mosaic, with the hydrophilic heads facing outward and the hydrophobic tails facing inward. The cell membrane regulates the movement of substances in and out of the cell, maintains cell integrity, and facilitates cell communication.

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