उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

कौन-सा कथन जीवाणुओं का वर्णन करता है?

1. Aवे एककोशिकीय प्रोकैरियोट हैं
2. Bवे केंद्रक वाले एककोशिकीय यूकैरियोट हैं
3. Cवे पौधों की तरह बहुकोशिकीय जीव हैं
4. Dवे कोशिकाएँ नहीं, प्रोटीन और DNA के कण हैं

What is the correct order of levels of organisation, from smallest to largest?

1. ACell, organ, tissue, organism, organ system
2. BCell, tissue, organ, organ system, organism
3. CTissue, cell, organ, organism, organ system
4. DOrgan, tissue, cell, organ system, organism

What does the enzyme DNA ligase do?

1. AIt joins pieces of DNA together
2. BIt unwinds the DNA double helix
3. CIt cuts DNA at specific sites
4. DIt makes RNA from a DNA template

एक विद्यार्थी परखता है कि प्रकाश की मात्रा बीन के पौधों की वृद्धि को कैसे प्रभावित करती है। कौन-सा नियंत्रित चर होना चाहिए?

1. Aप्रत्येक पौधे को मिलने वाले प्रकाश की मात्रा
2. Bप्रत्येक पौधे को मिलने वाले पानी की मात्रा
3. Cअंत में पौधों की ऊँचाई
4. Dप्रयोग का निष्कर्ष

Why does each type of virus infect only certain kinds of cells?

1. AIt must attach to specific receptor proteins on the cell surface
2. BIt can only enter cells that have no nucleus
3. CIt must find cells with the same DNA as its own
4. DIt can only enter cells that are dividing by meiosis at that time

What is the role of cholesterol in animal cell membranes?

1. AIt carries glucose molecules across the membrane into the cell
2. BIt keeps membrane fluidity stable as temperature changes
3. CIt stores the cell's genetic information
4. DIt forms a rigid wall around the cell

A restriction enzyme cuts at three sites in a linear piece of DNA. How many fragments are produced?

1. A3
2. B2
3. C6
4. D4

In a trial, 20% of patients improve on a new drug and 18% improve on a placebo. What is the best conclusion?

1. AThe drug works well, because 20% of patients improved
2. BThe placebo was harmful to the patients
3. CThe drug adds little benefit beyond the placebo
4. DThe drug is ten times better than the placebo