Biology Quiz Questions For Class 12 With Answers

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Biology Quiz Questions For Class 12 With Answers

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Biology Quiz Questions For Class 12 With Answers

What is the process by which RNA is made from DNA called? Answer: Transcription. Explanation: Transcription is the process of synthesizing RNA from a DNA template.
What is the genetic material in a virus? Answer: DNA or RNA. Explanation: Viruses can have either DNA or RNA as their genetic material.
Which molecule is responsible for carrying oxygen in the blood? Answer: Hemoglobin. Explanation: Hemoglobin is the protein molecule in red blood cells that carries oxygen from the lungs to the body’s tissues.
What is the process by which cells divide into two daughter cells? Answer: Mitosis. Explanation: Mitosis is the process by which a cell divides into two daughter cells with the same number of chromosomes as the parent cell.
Which organelle is responsible for protein synthesis? Answer: Ribosome. Explanation: Ribosomes are organelles responsible for synthesizing proteins.
What is the process by which a cell engulfs a particle by forming a vesicle around it? Answer: Endocytosis. Explanation: Endocytosis is the process by which a cell engulfs a particle by forming a vesicle around it.
Which hormone regulates blood sugar levels? Answer: Insulin. Explanation: Insulin is a hormone produced by the pancreas that regulates blood sugar levels.
What is the functional unit of the kidney? Answer: Nephron. Explanation: The nephron is the functional unit of the kidney responsible for filtering blood and producing urine.
Which molecule is responsible for storing genetic information? Answer: DNA. Explanation: DNA (deoxyribonucleic acid) is the molecule that stores genetic information in all living organisms.
What is the process by which a cell breaks down food molecules to release energy called? Answer: Cellular respiration. Explanation: Cellular respiration is the process by which cells break down food molecules to release energy.
Which type of tissue connects bone to muscle? Answer: Tendons. Explanation: Tendons are the connective tissue that connects muscle to bone.
Which organelle is responsible for producing ATP? Answer: Mitochondria. Explanation: Mitochondria are organelles responsible for producing ATP (adenosine triphosphate), the energy currency of the cell.
What is the process by which a sperm fuses with an egg called? Answer: Fertilization. Explanation: Fertilization is the process by which a sperm fuses with an egg to form a zygote.
Which molecule is responsible for transmitting signals between neurons? Answer: Neurotransmitters. Explanation: Neurotransmitters are the chemical messengers that transmit signals between neurons.
What is the process by which water moves across a membrane from an area of high concentration to an area of low concentration? Answer: Osmosis. Explanation: Osmosis is the process by which water moves across a membrane from an area of high concentration to an area of low concentration.
Which hormone regulates the body’s response to stress? Answer: Cortisol. Explanation: Cortisol is a hormone produced by the adrenal glands that regulates the body’s response to stress.
What is the process by which the body’s immune system attacks and destroys foreign invaders? Answer: Immune response. Explanation: The immune response is the process by which the body’s immune system attacks and destroys foreign invaders, such as bacteria or viruses.
Which organelle is responsible for packaging and sorting proteins for transport within the cell? Answer: Golgi apparatus. Explanation: The Golgi apparatus is an organelle responsible for packaging and sorting proteins for transport within the cell.
What is the process by which a plant takes in carbon dioxide from the air for photosynthesis?

Answer: The process by which a plant takes in carbon dioxide from the air for photosynthesis is called diffusion. During diffusion, carbon dioxide enters the plant through small openings called stomata, which are located on the surface of leaves and stems. Once inside the plant, carbon dioxide is used in the process of photosynthesis to produce glucose and oxygen.

Which type of tissue conducts water and nutrients throughout a plant? Answer: Xylem. Explanation: Xylem is a type of plant tissue responsible for conducting water and nutrients from the roots to the rest of the plant.
What is the process by which plants convert light energy into chemical energy? Answer: Photosynthesis. Explanation: Photosynthesis is the process by which plants convert light energy into chemical energy in the form of glucose.
Which hormone is responsible for promoting the growth and elongation of plant cells? Answer: Auxin. Explanation: Auxin is a plant hormone responsible for promoting the growth and elongation of plant cells.
What is the process by which a plant sheds its leaves? Answer: Abscission. Explanation: Abscission is the process by which a plant sheds its leaves, usually in response to changing environmental conditions.
Which hormone is responsible for promoting the ripening of fruits? Answer: Ethylene. Explanation: Ethylene is a plant hormone responsible for promoting the ripening of fruits.
What is the process by which an animal sheds its outer layer of skin? Answer: Molting. Explanation: Molting is the process by which an animal sheds its outer layer of skin or exoskeleton.
Which type of muscle is responsible for involuntary contractions of the digestive system? Answer: Smooth muscle. Explanation: Smooth muscle is a type of muscle responsible for involuntary contractions of the digestive system.
What is the process by which red blood cells are produced? Answer: Erythropoiesis. Explanation: Erythropoiesis is the process by which red blood cells are produced in the bone marrow.
Which part of the brain is responsible for regulating the body’s internal clock? Answer: Suprachiasmatic nucleus. Explanation: The suprachiasmatic nucleus is a part of the brain responsible for regulating the body’s internal clock.
What is the process by which a signal is transmitted from a neuron to a muscle cell or gland? Answer: Synaptic transmission. Explanation: Synaptic transmission is the process by which a signal is transmitted from a neuron to a muscle cell or gland.
Which hormone is responsible for stimulating milk production in nursing mothers? Answer: Prolactin. Explanation: Prolactin is a hormone produced by the pituitary gland that stimulates milk production in nursing mothers.