उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

What does gel electrophoresis separate?

1. ADNA fragments by size
2. BCells by their shape
3. CBlood into plasma and cells
4. DChromosomes by their colour

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

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

मनुष्य की एक सामान्य शरीर कोशिका में कितने गुणसूत्र होते हैं?

1. A44
2. B23
3. C46
4. D92

Yeast in bread dough breaks down sugar without oxygen. What does it produce?

1. AOxygen and water
2. BLactic acid and carbon dioxide
3. CGlucose and oxygen
4. DEthanol and carbon dioxide

The sodium-potassium pump moves ions across the cell membrane. What does one cycle of the pump do?

1. AMoves Na⁺ in and K⁺ out, without using ATP
2. BMoves 3 Na⁺ out and 2 K⁺ in, using ATP
3. CMoves 2 Na⁺ out and 3 K⁺ in, using ATP
4. DMoves 3 K⁺ out and 2 Na⁺ in, using ATP

What do nitrogen-fixing bacteria do?

1. AThey convert nitrogen gas into compounds that plants can use
2. BThey release nitrogen gas from dead organisms into the air
3. CThey turn carbon dioxide into sugar
4. DThey break down proteins into glucose

स्वयंसेवक 0, 100 या 200 mg कैफ़ीन पीते हैं, और 30 मिनट बाद उनकी हृदय गति मापी जाती है। आश्रित चर क्या है?

1. Aकैफ़ीन की खुराक
2. B30 मिनट का प्रतीक्षा समय
3. C30 मिनट बाद की हृदय गति
4. Dस्वयं स्वयंसेवक

Paper discs with antibiotics X, Y and Z are placed on a plate covered with bacteria. The clear zones around them are 2 mm, 15 mm and 0 mm wide. What is the best conclusion?

1. AX is most effective, and the bacteria are resistant to Y
2. BY is most effective, and the bacteria are resistant to Z
3. CAll three are equally effective against these bacteria
4. DZ is most effective, because no bacteria grew under the disc