Class 11 Biology MCQ

1. Which type of reproduction involves only one parent and gives rise to offspring identical to the parent? a) Sexual reproduction b) Fragmentation c) Budding d) Asexual reproduction Click to View Answer and Explanation Answer: d) Asexual reproduction Explanation: Asexual reproduction involves only one parent and produces offspring that are genetically identical to the parent. […]

1. Which gland is often referred to as the "master gland"? a) Thyroid gland b) Adrenal gland c) Pancreas d) Pituitary gland Click to View Answer and Explanation Answer: d) Pituitary gland Explanation: The pituitary gland is often called the "master gland" because it regulates many other glands in the endocrine system. 2. Which hormone

1. Which type of muscle is involuntary and lacks striations? a) Cardiac muscle b) Smooth muscle c) Skeletal muscle d) Tendons Click to View Answer and Explanation Answer: b) Smooth muscle Explanation: Smooth muscles are involuntary, non-striated muscles found mainly in the walls of hollow organs. 2. Which of the following joints allows movement in

1. Which of the following is the primary excretory organ in humans? a) Liver b) Lungs c) Kidneys d) Skin Click to View Answer and Explanation Answer: c) Kidneys Explanation: Kidneys are the primary excretory organs in humans responsible for filtering and eliminating waste products. 2. Urea is produced in the: a) Kidneys b) Liver

1. Which component of blood helps in clotting? a) Red blood cells b) White blood cells c) Platelets d) Plasma Click to View Answer and Explanation Answer: c) Platelets Explanation: Platelets are responsible for blood clotting, preventing excessive bleeding during injuries. 2. Which chamber of the heart receives oxygenated blood from the lungs? a) Right

1. Which of the following is the primary site of gaseous exchange in humans? a) Trachea b) Bronchus c) Alveoli d) Bronchioles Click to View Answer and Explanation Answer: c) Alveoli Explanation: Alveoli are tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place. 2. Which muscle plays a

1. Which of the following processes releases energy in plants? a) Photosynthesis b) Transpiration c) Respiration d) Diffusion Click to View Answer and Explanation Answer: c) Respiration Explanation: Respiration is the metabolic process in which stored energy is released, providing the necessary energy for cellular activities. 2. Where does glycolysis occur in plant cells? a)

1. Which of the following elements is essential for the synthesis of chlorophyll? a) Iron b) Manganese c) Zinc d) Copper Click to View Answer and Explanation Answer: a) Iron Explanation: Iron is crucial for the synthesis of chlorophyll, a pigment vital for photosynthesis. 2. Which process allows plants to fix atmospheric nitrogen? a) Photosynthesis

1. Which tissue in plants is primarily involved in the transport of water and minerals? a) Xylem b) Phloem c) Epidermis d) Cortex Click to View Answer and Explanation Answer: a) Xylem Explanation: Xylem is specialized for the transport of water and dissolved minerals from roots to various parts of the plant. 2. The primary

1. The phase of the cell cycle during which DNA replication occurs is: a) G1 phase b) G2 phase c) S phase d) M phase Click to View Answer and Explanation Answer: c) S phase Explanation: S phase (synthesis phase) is when DNA replication takes place, ensuring each daughter cell receives an exact copy. 2.

1. Which part of the cell is responsible for regulating the entry and exit of substances? a) Mitochondria b) Nucleus c) Cell membrane d) Cytoplasm Click to View Answer and Explanation Answer: c) Cell membrane Explanation: The cell membrane is semi-permeable and regulates the transport of substances in and out of the cell. 2. Which

1. Which of the following is NOT a type of connective tissue? a) Cartilage b) Nerve tissue c) Blood d) Bone Click to View Answer and Explanation Answer: b) Nerve tissue Explanation: Nerve tissue is responsible for receiving and transmitting stimuli; it's not a connective tissue. 2. Which animal tissue provides shape, support, and facilitates

1. Which tissue is responsible for the growth in length of a plant? a) Apical meristem b) Lateral meristem c) Intercalary meristem d) Permanent tissue Click to View Answer and Explanation Answer: a) Apical meristem Explanation: The apical meristem is present at the tips of roots and shoots and causes primary growth or elongation. 2.

1. Which part of a plant is responsible for photosynthesis? a) Root b) Stem c) Leaf d) Flower Click to View Answer and Explanation Answer: c) Leaf Explanation: Leaves contain chlorophyll and are the primary site for photosynthesis. 2. The main function of root hairs is: a) Anchoring the plant b) Storage c) Absorption of

1. Which of the following animals is cold-blooded? a) Birds b) Mammals c) Amphibians d) Whales Click to View Answer and Explanation Answer: c) Amphibians Explanation: Amphibians are ectothermic (cold-blooded) animals. 2. Radial symmetry is characteristic of: a) Mammals b) Birds c) Cnidarians d) Insects Click to View Answer and Explanation Answer: c) Cnidarians Explanation:

1. Which of the following is not a seed-bearing plant? a) Gymnosperms b) Angiosperms c) Pteridophytes d) Dicotyledons Click to View Answer and Explanation Answer: c) Pteridophytes Explanation: Pteridophytes are vascular plants that reproduce via spores and not seeds. 2. Mosses and ferns belong to: a) Algae b) Bryophytes c) Pteridophytes d) Gymnosperms Click to

1. Which of the following is not a primary kingdom according to the five-kingdom classification? a) Protista b) Monera c) Annelida d) Fungi Click to View Answer and Explanation Answer: c) Annelida Explanation: Annelida is a phylum under the Animalia kingdom. Monera, Protista, and Fungi are primary kingdoms. 2. Which organisms are commonly referred to

1. Which of the following is not considered a characteristic of living organisms? a) Growth b) Reproduction c) Metabolism d) Luminosity Click to View Answer and Explanation Answer: d) Luminosity Explanation: Luminosity or brightness is not a fundamental characteristic of living organisms. Growth, Reproduction, and Metabolism are essential life processes. 2. Who introduced the system