उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

What are the three parts of a nucleotide?

1. AA phosphate, a sugar and a nitrogen base
2. BA glycerol, a phosphate and a fatty acid
3. CA carboxyl group, a base and a lipid
4. DAn amino group, a sugar and a fatty acid

What are the bacteria called that normally live on the skin and in the gut without causing disease?

1. AVectors
2. BPrions
3. CNormal flora
4. DPathogens

कोशिका सिद्धांत के अनुसार नई कोशिकाएँ कहाँ से आती हैं?

1. Aशरीर के निर्जीव पदार्थ से
2. Bशरीर में प्रवेश करने वाले विषाणुओं से
3. Cभोजन के खनिजों से
4. Dपहले से मौजूद कोशिकाओं से

In which part of the chloroplast do the light-dependent reactions happen?

1. AIn the stroma
2. BIn the cell wall
3. CIn the thylakoid membranes
4. DIn the outer membrane

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 plant cell
4. DA bacterial cell

How does facilitated diffusion differ from active transport?

1. AIt needs no energy and moves substances down their gradient
2. BIt needs ATP and moves substances against their gradient
3. CIt moves only water and no other substances
4. DIt works without any membrane proteins

A nurse notices that patients who used a new mouthwash had few mouth infections. No other patients were studied. What is most needed before concluding that the mouthwash works?

1. AA comparable group that does not use the mouthwash
2. BA larger bottle of the same mouthwash for each patient
3. CA survey asking patients if they liked it
4. DA longer explanation in the report

A drug lowered blood pressure in a study of 20 men aged 40 to 50. Why might the result not apply to women over 70?

1. ABlood pressure cannot be measured in older women
2. BThe study had a dependent variable
3. CThe sample did not represent that group
4. DThe results were too precise to be trusted