उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

ग्लूकोज़ किस प्रकार के अणु का उदाहरण है?

1. Aपॉलीसैकेराइड
2. Bमोनोसैकेराइड
3. Cप्रोटीन
4. Dलिपिड

What is a decomposer?

1. AAn organism that breaks down dead material
2. BAn animal that hunts other animals
3. CAn animal that eats only plants
4. DAn organism that makes food from sunlight

What is a mutagen?

1. ASomething that can cause changes in DNA
2. BA protein that repairs damaged DNA
3. CA cell that divides without control
4. DAn enzyme that copies DNA

A solution of pH 4 is compared with a solution of pH 6. How many times more hydrogen ions does the pH 4 solution have?

1. A20 times
2. B10 times
3. C2 times
4. D100 times

Which is an example of negative feedback?

1. AContractions growing stronger during labour
2. BBlood clotting speeding up once it starts
3. CA wound becoming more inflamed over time
4. DSweating when body temperature rises

Human adult height varies across a smooth, continuous range rather than falling into a few separate groups. What is the best explanation?

1. AIt is controlled by many genes and also affected by environment
2. BIt is an X-linked recessive trait
3. CIt is controlled only by the environment
4. DIt is controlled by one gene with two alleles and full dominance

Plants in waterlogged soil take up fewer mineral ions, even when the ions are plentiful. What is the best explanation?

1. AMineral ions only enter by osmosis, and osmosis stops in wet soil
2. BRoot cells lack oxygen, so less ATP is made for active transport
3. CWaterlogged roots carry out more photosynthesis
4. DWater dilutes the ions so much that roots cannot detect them

Some viruses are surrounded by a lipid envelope taken from the host cell's membrane. Why are these viruses usually inactivated easily by soap and alcohol?

1. ASoap and alcohol break up the lipid envelope
2. BSoap and alcohol dissolve the viral DNA directly
3. CEnveloped viruses have no proteins at all
4. DThe envelope is made of chitin, which soap digests