121. Practice check: Choose the correct biology answer: which organ filters blood to produce urine?
✅ D. Kidney
a: Stomach | b: Pancreas | c: Lung | d: Kidney Read more
Biology MCQs – Page 7
122. Practice check: Choose the correct biology answer: which blood type is commonly called the universal red-cell donor in emergency contexts?
✅ A. O negative
a: O negative | b: B negative | c: A positive | d: AB positive Read more
123. Practice check: Choose the correct biology answer: which molecule carries hereditary information in most organisms?
✅ D. DNA
a: ATP | b: Glucose | c: Cellulose | d: DNA Read more
124. Practice check: Choose the correct biology answer: what is the basic structural and functional unit of life?
✅ C. Cell
a: Organ | b: Organ system | c: Cell | d: Tissue Read more
125. Practice check: Choose the correct biology answer: which organelle is often called the powerhouse of the cell?
✅ C. Mitochondrion
a: Lysosome | b: Golgi apparatus | c: Mitochondrion | d: Ribosome Read more
126. Practice check: Which option correctly completes the fact: which gas is released by plants during photosynthesis?
✅ A. Oxygen
a: Oxygen | b: Ammonia | c: Methane | d: Carbon monoxide Read more
127. Practice check: Which option correctly completes the fact: which process reduces chromosome number to form gametes?
✅ D. Meiosis
a: Mitosis | b: Budding | c: Binary fission | d: Meiosis Read more
128. Practice check: Which option correctly completes the fact: which plant tissue transports sugars?
✅ C. Phloem
a: Xylem | b: Stomata | c: Phloem | d: Cuticle Read more
129. Practice check: Which option correctly completes the fact: which plant tissue transports water upward?
✅ A. Xylem
a: Xylem | b: Phloem | c: Cortex only | d: Epidermis Read more
130. Practice check: Which option correctly completes the fact: which blood component helps form clots?
✅ B. Platelets
a: Alveoli | b: Platelets | c: Neurons | d: Red blood cells Read more
131. Practice check: Which option correctly completes the fact: which part of the eye controls the amount of light entering?
✅ D. Iris
a: Optic nerve | b: Cornea only | c: Retina | d: Iris Read more
132. Practice check: Which option correctly completes the fact: what is the largest organ of the human body?
✅ D. Skin
a: Lung | b: Brain | c: Liver | d: Skin Read more
133. Practice check: Which option correctly completes the fact: which structure controls what enters and leaves a cell?
✅ D. Cell membrane
a: Chromosome | b: Cell wall only | c: Nucleolus | d: Cell membrane Read more
134. Practice check: Which option correctly completes the fact: which molecule is the main immediate energy currency of cells?
✅ D. ATP
a: RNA | b: Starch | c: DNA | d: ATP Read more
135. Practice check: Which option correctly completes the fact: which organisms make their own food using sunlight in most ecosystems?
✅ D. Producers
a: Decomposers only | b: Predators | c: Primary consumers | d: Producers Read more
136. Practice check: Which option correctly completes the fact: what is the study of insects called?
✅ A. Entomology
a: Entomology | b: Botany | c: Mycology | d: Herpetology Read more
137. Practice check: Which option correctly completes the fact: what is the study of fungi called?
✅ D. Mycology
a: Ecology | b: Ornithology | c: Entomology | d: Mycology Read more
138. Practice check: Which option correctly completes the fact: which part of the brain helps coordinate balance and movement?
✅ C. Cerebellum
a: Medulla only | b: Hypothalamus | c: Cerebellum | d: Pituitary gland Read more
139. Practice check: Which option correctly completes the fact: which organ produces insulin?
✅ B. Pancreas
a: Gallbladder | b: Pancreas | c: Thyroid | d: Spleen Read more
140. Practice check: Which option correctly completes the fact: which vitamin is essential for normal blood clotting?
✅ C. Vitamin K
a: Vitamin B1 | b: Vitamin C | c: Vitamin K | d: Vitamin D Read more