Preparing for the OTET Paper-II Exam in Life Science? Master your preparation with these top 30 multiple-choice questions. Covering key areas such as biological adaptations, cellular structure, respiration, transpiration, soil and forest resources, micro-organisms, and adolescence, these questions offer a comprehensive review. They range from topics like the function of mitochondria, the role of stomata, to understanding the importance of humus in soil, and physiological changes during puberty. These questions are designed to test your understanding and help you excel in the OTET examination, making them essential for any aspiring teacher’s study toolkit.
Top 30 Life Science MCQS For OTET Paper-II Exam
- Which of the following is an example of structural adaptation in animals?
a) Hibernation
b) Camouflage
c) Migration
d) Sweating
Answer: b) Camouflage - How do cacti adapt to their arid environment?
a) Large leaves
b) Deep roots
c) Spines instead of leaves
d) Thin cuticle
Answer: c) Spines instead of leaves - Which animal is known for its physiological adaptation to survive without water for extended periods?
a) Elephant
b) Camel
c) Dolphin
d) Frog
Answer: b) Camel - The ability of certain animals to blend with their surroundings is called:
a) Mimicry
b) Adaptation
c) Camouflage
d) Migration
Answer: c) Camouflage - What type of adaptation is exhibited by plants growing in salty environments?
a) Halophytes
b) Xerophytes
c) Hydrophytes
d) Mesophytes
Answer: a) Halophytes - Which process in plants is responsible for the uptake of carbon dioxide?
a) Respiration
b) Transpiration
c) Photosynthesis
d) Fermentation
Answer: c) Photosynthesis - The process by which water vapor is lost from the aerial parts of plants is called:
a) Respiration
b) Photosynthesis
c) Transpiration
d) Osmosis
Answer: c) Transpiration - In humans, which gas is primarily exhaled during respiration?
a) Oxygen
b) Nitrogen
c) Carbon Dioxide
d) Hydrogen
Answer: c) Carbon Dioxide - Which organelle is the site of cellular respiration in eukaryotic cells?
a) Nucleus
b) Chloroplast
c) Mitochondrion
d) Ribosome
Answer: c) Mitochondrion - Stomata are involved in:
a) Respiration
b) Photosynthesis
c) Transpiration
d) All of the above
Answer: d) All of the above - Which soil component is primarily responsible for nutrient retention?
a) Sand
b) Clay
c) Silt
d) Gravel
Answer: b) Clay - What is the term for the uppermost layer of soil rich in organic material?
a) Subsoil
b) Bedrock
c) Topsoil
d) Parent material
Answer: c) Topsoil - Deforestation primarily results in:
a) Increased biodiversity
b) Soil erosion
c) Improved air quality
d) Water conservation
Answer: b) Soil erosion - Which type of forest is characterized by a high amount of rainfall and biodiversity?
a) Temperate forest
b) Boreal forest
c) Tropical rainforest
d) Deciduous forest
Answer: c) Tropical rainforest - Humus in soil is important because it:
a) Retains water
b) Adds nutrients
c) Improves soil structure
d) All of the above
Answer: d) All of the above - Which organelle is known as the “powerhouse of the cell”?
a) Nucleus
b) Mitochondrion
c) Endoplasmic Reticulum
d) Golgi Apparatus
Answer: b) Mitochondrion - The site of protein synthesis in the cell is:
a) Nucleus
b) Ribosome
c) Lysosome
d) Chloroplast
Answer: b) Ribosome - Which organelle is involved in the modification and packaging of proteins?
a) Golgi Apparatus
b) Lysosome
c) Endoplasmic Reticulum
d) Vacuole
Answer: a) Golgi Apparatus - Chloroplasts are found in:
a) Animal cells only
b) Plant cells only
c) Both animal and plant cells
d) Fungal cells only
Answer: b) Plant cells only - Which of the following is the function of lysosomes?
a) Protein synthesis
b) Lipid synthesis
c) Digestion of cellular waste
d) ATP production
Answer: c) Digestion of cellular waste - Which micro-organism is responsible for fermentation in bread-making?
a) Bacteria
b) Virus
c) Yeast
d) Algae
Answer: c) Yeast - Which disease is caused by a bacterium?
a) Influenza
b) Tuberculosis
c) Malaria
d) HIV/AIDS
Answer: b) Tuberculosis - Antibiotics are used to treat infections caused by:
a) Viruses
b) Bacteria
c) Fungi
d) Protozoa
Answer: b) Bacteria - Penicillin, the first antibiotic, is derived from:
a) Bacteria
b) Algae
c) Fungi
d) Protozoa
Answer: c) Fungi - Which of the following micro-organisms can be used in bioremediation to clean up oil spills?
a) Viruses
b) Yeast
c) Bacteria
d) Protozoa
Answer: c) Bacteria - Which gland is responsible for the production of hormones during puberty?
a) Thyroid gland
b) Adrenal gland
c) Pituitary gland
d) Pancreas
Answer: c) Pituitary gland - During adolescence, the body undergoes significant changes primarily due to:
a) Increase in metabolic rate
b) Growth spurts
c) Hormonal changes
d) All of the above
Answer: d) All of the above - The period of rapid physical growth and sexual maturation in adolescence is known as:
a) Menopause
b) Infancy
c) Puberty
d) Senescence
Answer: c) Puberty - Which of the following is a common psychological change during adolescence?
a) Increased dependence on parents
b) Decreased emotional sensitivity
c) Development of identity
d) Reduced cognitive abilities
Answer: c) Development of identity - Menarche is the term used to describe:
a) The onset of puberty in boys
b) The first menstrual period in girls
c) The end of adolescence
d) None of the above
Answer: b) The first menstrual period in girls
