उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

Which organelle breaks down fatty acids and hydrogen peroxide?

1. ARibosome
2. BPeroxisome
3. CChloroplast
4. DCentriole

What is the main job of the large central vacuole in a plant cell?

1. AIt copies DNA before the cell divides
2. BIt assembles proteins from amino acids
3. CIt captures light energy for photosynthesis
4. DIt stores water and keeps the cell firm

What does it mean that a cell membrane is selectively permeable?

1. AIt lets no substance cross at all
2. BIt lets some substances cross but not others
3. CIt lets every substance cross freely in both directions
4. DIt lets only water molecules cross

Why does ice float on liquid water?

1. AIce is denser than liquid water
2. BIce contains more air than liquid water
3. CHydrogen bonds hold ice in an open, less dense structure
4. DIce molecules are lighter than liquid water molecules

What happens during telophase of mitosis?

1. AThe sister chromatids are pulled apart
2. BA nuclear envelope forms around each set of chromosomes
3. CThe DNA is copied for the next division
4. DThe chromosomes line up across the middle of the cell

A cell has a nucleus and mitochondria but no cell wall and no chloroplasts. What kind of cell is it most likely to be?

1. AA fungal cell
2. BAn animal cell
3. CA bacterial cell
4. DA plant cell

In a family, a trait appears mostly in males. Affected men have daughters who are unaffected, but some of these daughters have affected sons. Which pattern fits best?

1. AY-linked
2. BAutosomal recessive with equal sexes
3. CX-linked recessive
4. DAutosomal dominant

A cube-shaped cell has sides of 2 µm. What is its surface area-to-volume ratio?

1. A3 : 1
2. B6 : 1
3. C1 : 3
4. D2 : 1