multiple-choice questions (MCQs) on Class 11 Biology with their answers:
here are multiple-choice questions (MCQs) on Class 11 Biology with their answers:
1. What is the primary function of the mitochondria in a cell?
a) Protein synthesis
b) Energy production
c) Storage of genetic information
d) Waste elimination
Answer: b) Energy production
2. Which organelle is responsible for photosynthesis in plant cells?
a) Mitochondria
b) Ribosome
c) Chloroplast
d) Endoplasmic reticulum
Answer: c) Chloroplast
3. The genetic material in a prokaryotic cell is found in the:
a) Nucleus
b) Cytoplasm
c) Mitochondria
d) Cell wall
Answer: b) Cytoplasm
4. Which of the following is NOT a function of the cell membrane?
a) Regulating the passage of substances in and out of the cell
b) Providing structural support to the cell
c) Recognizing and binding to specific molecules
d) Facilitating cell communication
Answer: b) Providing structural support to the cell
5. What is the function of the Golgi apparatus in a cell?
a) Protein synthesis
b) Lipid synthesis
c) Sorting and packaging of molecules for transport
d) Energy production
Answer: c) Sorting and packaging of molecules for transport
6. Which type of cell division results in the formation of two identical daughter cells?
a) Mitosis
b) Meiosis
c) Both mitosis and meiosis
d) Neither mitosis nor meiosis
Answer: a) Mitosis
7. What is the function of the ribosomes in a cell?
a) Energy production
b) Protein synthesis
c) DNA replication
d) Lipid synthesis
Answer: b) Protein synthesis
8. Which of the following is a nitrogenous base found in RNA but not in DNA?
a) Adenine
b) Thymine
c) Uracil
d) Cytosine
Answer: c) Uracil
9. Which of the following is an example of an autotrophic organism?
a) Human
b) Dog
c) Oak tree
d) Fungus
Answer: c) Oak tree
10. What is the function of red blood cells in the human body?
a) Transporting oxygen
b) Digesting food
c) Producing insulin
d) Filtering blood
Answer: a) Transporting oxygen
11. Which of the following is NOT a primary tissue type in animals?
a) Epithelial
b) Connective
c) Muscle
d) Photosynthetic
Answer: d) Photosynthetic
12. What is the function of the circulatory system in animals?
a) Respiration
b) Digestion
c) Transportation of nutrients and oxygen
d) Protection from pathogens
Answer: c) Transportation of nutrients and oxygen
13. Which of the following is a characteristic of vertebrates?
a) They have a notochord at some stage of their life.
b) They lack a backbone.
c) They are all cold-blooded.
d) They reproduce asexually.
Answer: a) They have a notochord at some stage of their life.
14. In which part of a plant does photosynthesis primarily occur?
a) Roots
b) Leaves
c) Stems
d) Flowers
Answer: b) Leaves
15. Which of the following is NOT a function of the nervous system in humans?
a) Sensory perception
b) Coordination of body movements
c) Regulation of body temperature
d) Memory storage
Answer: c) Regulation of body temperature
16. What is the function of the hypothalamus in the human brain?
a) Regulation of body temperature and hunger
b) Visual processing
c) Muscle coordination
d) Long-term memory storage
Answer: a) Regulation of body temperature and hunger
17. Which of the following is a primary sex organ in males?
a) Ovary
b) Testis
c) Uterus
d) Fallopian tube
Answer: b) Testis
18. What is the primary function of the respiratory system in humans?
a) Digestion
b) Circulation
c) Breathing and gas exchange
d) Excretion
Answer: c) Breathing and gas exchange
19. Which of the following is responsible for breaking down carbohydrates in the digestive system?
a) Amylase
b) Lipase
c) Trypsin
d) DNA polymerase
Answer: a) Amylase
20. What is the function of the adrenal glands in the human body?
a) Producing insulin
b) Regulating blood pressure and stress response
c) Synthesizing red blood cells
d) Aiding in digestion
Answer: b) Regulating blood pressure and stress response
These multiple-choice questions cover various topics in Class 11 Biology and can serve as a helpful resource for self-assessment and practice.
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