उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

What is a heterotroph?

1. AAn organism with no cells
2. BAn organism that lives only in water
3. CAn organism that gets its food from other organisms
4. DAn organism that makes its own food by photosynthesis

प्रोटीनों के निर्माण-खंड (मोनोमर) क्या हैं?

1. Aन्यूक्लियोटाइड
2. Bमोनोसैकेराइड
3. Cवसीय अम्ल
4. Dअमीनो अम्ल

What are cilia?

1. AShort hair-like projections that beat in waves
2. BOpenings in the nuclear envelope
3. CFolds of the inner mitochondrial membrane that make ATP
4. DSmall round sacs that hold digestive enzymes

In a food chain, which organisms are the producers?

1. APlants and algae that make food by photosynthesis
2. BAnimals that eat only plants, such as rabbits and deer
3. CPredators at the top of the chain
4. DFungi that break down dead material

What happens to an enzyme after it has catalysed a reaction?

1. AIt changes into the substrate
2. BIt is released unchanged and can be used again
3. CIt becomes part of the product and leaves with it
4. DIt is broken down into amino acids

What is an inversion mutation?

1. AA segment of a chromosome is lost completely
2. BA whole extra chromosome is added to the cell
3. CA chromosome segment breaks off and is reattached the wrong way round
4. DA segment of a chromosome moves to a different, non-matching chromosome

Why can O-negative red blood cells be given to patients of almost any blood type in an emergency?

1. AThey carry no A, B or RhD antigens
2. BThey have no haemoglobin to react with
3. CTheir plasma contains anti-A and anti-B antibodies
4. DThey carry all of the A, B and RhD antigens

A new infectious agent passes through filters that trap bacteria, does not grow on nutrient agar and multiplies only inside living cells. What is it most likely to be?

1. AA virus
2. BA protozoan
3. CA bacterium
4. DA fungus