Biology (School & UG)
Q. Which process directly follows transcription in the central dogma?
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A.
Replication
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B.
Translation
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C.
Splicing
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D.
Translocation
Solution
Translation directly follows transcription, where the mRNA is translated into a polypeptide chain at the ribosome.
Correct Answer: B — Translation
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Q. Which process involves the conversion of light energy into chemical energy in plants?
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A.
Respiration
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B.
Photosynthesis
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C.
Transpiration
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D.
Fermentation
Solution
Photosynthesis is the process that converts light energy into chemical energy in the form of glucose.
Correct Answer: B — Photosynthesis
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Q. Which process involves the conversion of mRNA into a protein?
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A.
Replication
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B.
Transcription
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C.
Translation
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D.
Translocation
Solution
Translation is the process by which the sequence of nucleotides in mRNA is translated into a sequence of amino acids, forming a protein.
Correct Answer: C — Translation
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Q. Which process involves the synthesis of RNA from a DNA template?
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A.
Translation
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B.
Replication
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C.
Transcription
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D.
Mutation
Solution
Transcription is the process of synthesizing RNA from a DNA template.
Correct Answer: C — Transcription
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Q. Which process involves the transfer of genetic material from one generation of plants to the next?
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A.
Transcription
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B.
Translation
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C.
Replication
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D.
Inheritance
Solution
Inheritance is the process by which genetic material is passed from parents to offspring.
Correct Answer: D — Inheritance
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Q. Which process involves the transfer of pollen from the male anther to the female stigma?
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A.
Fertilization
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B.
Pollination
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C.
Germination
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D.
Photosynthesis
Solution
Pollination is the process of transferring pollen to enable fertilization.
Correct Answer: B — Pollination
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Q. Which process is primarily responsible for the movement of water through xylem?
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A.
Active transport
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B.
Diffusion
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C.
Transpiration
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D.
Osmosis
Solution
Transpiration creates a negative pressure in the leaves, which pulls water upward through the xylem.
Correct Answer: C — Transpiration
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Q. Which process occurs during the dark reactions of photosynthesis?
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A.
Photolysis of water
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B.
Carbon fixation
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C.
Light absorption
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D.
Oxygen release
Solution
Carbon fixation occurs during the dark reactions, specifically in the Calvin cycle.
Correct Answer: B — Carbon fixation
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Q. Which process occurs during the light reactions of photosynthesis?
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A.
Carbon fixation
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B.
Water splitting
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C.
Glucose synthesis
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D.
Oxygen uptake
Solution
Water splitting occurs during the light reactions, producing oxygen and electrons.
Correct Answer: B — Water splitting
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Q. Which process occurs in the dark reactions of photosynthesis?
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A.
Photolysis of water
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B.
Carbon fixation
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C.
Light absorption
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D.
Electron transport chain
Solution
Carbon fixation occurs during the dark reactions of photosynthesis.
Correct Answer: B — Carbon fixation
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Q. Which reproductive strategy involves the development of offspring inside the mother's body?
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A.
Oviparity
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B.
Viviparity
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C.
Ovoviviparity
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D.
Asexual reproduction
Solution
Viviparity is the reproductive strategy where offspring develop inside the mother's body and are born live.
Correct Answer: B — Viviparity
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Q. Which respiratory condition is characterized by chronic inflammation of the airways?
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A.
Asthma
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B.
Pneumonia
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C.
Bronchitis
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D.
Emphysema
Solution
Asthma is characterized by chronic inflammation of the airways, leading to difficulty in breathing.
Correct Answer: A — Asthma
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Q. Which respiratory condition is characterized by inflammation of the airways?
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A.
Asthma
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B.
Pneumonia
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C.
Bronchitis
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D.
Emphysema
Solution
Bronchitis is characterized by inflammation of the bronchial tubes, leading to coughing and difficulty breathing.
Correct Answer: C — Bronchitis
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Q. Which respiratory condition is characterized by the inflammation of the airways?
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A.
Asthma
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B.
Pneumonia
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C.
Emphysema
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D.
Bronchitis
Solution
Bronchitis is the inflammation of the bronchial tubes, leading to coughing and difficulty breathing.
Correct Answer: D — Bronchitis
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Q. Which respiratory condition is primarily caused by smoking?
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A.
Asthma
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B.
Lung cancer
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C.
Cystic fibrosis
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D.
Tuberculosis
Solution
Lung cancer is primarily caused by smoking, which introduces carcinogens that can lead to the development of cancerous cells in lung tissue.
Correct Answer: B — Lung cancer
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Q. Which stage of the plant life cycle is characterized by the formation of gametes?
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A.
Sporophyte
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B.
Gametophyte
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C.
Seedling
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D.
Mature plant
Solution
The gametophyte stage is where gametes are produced in the plant life cycle.
Correct Answer: B — Gametophyte
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Q. Which structure connects the fetus to the placenta?
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A.
Umbilical cord
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B.
Fallopian tube
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C.
Vagina
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D.
Cervix
Solution
The umbilical cord connects the fetus to the placenta, facilitating nutrient and waste exchange.
Correct Answer: A — Umbilical cord
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Q. Which structure develops from the ectoderm during embryonic development?
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A.
Muscles
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B.
Skin and nervous system
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C.
Digestive system
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D.
Lungs
Solution
The ectoderm gives rise to the skin and nervous system during embryonic development.
Correct Answer: B — Skin and nervous system
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Q. Which structure in plant cells contains chlorophyll?
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A.
Mitochondria
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B.
Chloroplasts
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C.
Nucleus
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D.
Ribosomes
Solution
Chloroplasts are the organelles that contain chlorophyll and are the site of photosynthesis.
Correct Answer: B — Chloroplasts
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Q. Which structure in plant cells is responsible for packaging and distributing proteins?
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A.
Golgi apparatus
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B.
Lysosome
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C.
Nucleus
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D.
Vacuole
Solution
The Golgi apparatus modifies, sorts, and packages proteins for secretion or delivery to other organelles.
Correct Answer: A — Golgi apparatus
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Q. Which structure in plant cells is responsible for the synthesis of ATP?
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A.
Chloroplast
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B.
Mitochondrion
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C.
Nucleus
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D.
Golgi apparatus
Solution
Mitochondria are responsible for synthesizing ATP through the process of cellular respiration.
Correct Answer: B — Mitochondrion
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Q. Which structure in plant cells is selectively permeable and regulates the movement of substances?
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A.
Cell wall
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B.
Plasma membrane
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C.
Nucleus
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D.
Vacuole
Solution
The plasma membrane is selectively permeable, controlling the entry and exit of substances in and out of the cell.
Correct Answer: B — Plasma membrane
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Q. Which structure in plant leaves is primarily responsible for gas exchange?
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A.
Stomata
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B.
Cuticle
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C.
Chloroplasts
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D.
Xylem vessels
Solution
Stomata are small openings on the leaf surface that allow for gas exchange, including the intake of carbon dioxide and the release of oxygen.
Correct Answer: A — Stomata
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Q. Which structure in plants is primarily involved in reproduction?
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A.
Roots
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B.
Leaves
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C.
Flowers
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D.
Stems
Solution
Flowers are the reproductive structures in angiosperms, facilitating pollination and seed production.
Correct Answer: C — Flowers
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Q. Which structure in the flower is responsible for receiving pollen?
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A.
Stamen
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B.
Pistil
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C.
Sepal
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D.
Petal
Solution
The pistil, which includes the stigma, style, and ovary, is responsible for receiving pollen during pollination.
Correct Answer: B — Pistil
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Q. Which structure in the heart initiates the electrical impulse for contraction?
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A.
Atrioventricular node
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B.
Sinoatrial node
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C.
Bundle of His
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D.
Purkinje fibers
Solution
The sinoatrial (SA) node initiates the electrical impulse that triggers heart contractions.
Correct Answer: B — Sinoatrial node
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Q. Which structure in the human body is responsible for producing insulin?
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A.
Liver
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B.
Pancreas
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C.
Kidneys
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D.
Spleen
Solution
The pancreas is responsible for producing insulin, a hormone that regulates blood sugar levels.
Correct Answer: B — Pancreas
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Q. Which structure in the human eye is responsible for focusing light onto the retina?
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A.
Cornea
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B.
Lens
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C.
Iris
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D.
Pupil
Solution
The lens is responsible for focusing light onto the retina, allowing for clear vision.
Correct Answer: B — Lens
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Q. Which structure in the respiratory system is primarily responsible for gas exchange?
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A.
Bronchi
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B.
Alveoli
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C.
Trachea
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D.
Larynx
Solution
Alveoli are tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged between the air and blood.
Correct Answer: B — Alveoli
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Q. Which structure in the respiratory system is responsible for gas exchange?
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A.
Bronchi
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B.
Alveoli
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C.
Trachea
-
D.
Larynx
Solution
The alveoli are tiny air sacs in the lungs where gas exchange occurs, allowing oxygen to enter the blood and carbon dioxide to be expelled.
Correct Answer: B — Alveoli
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