उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

What does the polymerase chain reaction (PCR) do?

1. AIt separates proteins by their charge
2. BIt makes many copies of a piece of DNA
3. CIt cuts DNA at specific sequences
4. DIt turns RNA into protein

इनमें से कौन-सा लिपिड है?

1. ADNA
2. Bग्लाइकोजन, ग्लूकोज़ का भंडारण रूप
3. Cहीमोग्लोबिन
4. Dट्राइग्लिसराइड (वसा)

Which of these is qualitative data?

1. AThe urine sample is dark yellow
2. BThe patient weighs 68 kg
3. CThe pulse rate is 72 beats per minute
4. DThe wound is 3 cm long

A seedling is 4 cm tall at week 1, 8 cm at week 2, 12 cm at week 3 and 16 cm at week 4. If the trend continues, how tall will it be at week 6?

1. A20 cm
2. B18 cm
3. C24 cm
4. D32 cm

Sickle cell disease is caused by a single base change that replaces one amino acid in haemoglobin. What type of mutation is this?

1. AA nonsense mutation
2. BA silent mutation
3. CA missense mutation
4. DA frameshift mutation

प्रोटीन में अमीनो अम्लों को कौन-सा आबंध जोड़ता है?

1. Aक्षारकों के बीच हाइड्रोजन आबंध
2. Bपेप्टाइड आबंध
3. Cएस्टर आबंध
4. Dग्लाइकोसिडिक आबंध

A mutation changes one amino acid in an enzyme. In which location is the change most likely to stop the enzyme from working?

1. AIn the gene's stop codon
2. BOn the outer surface, far from the active site
3. CIn a section that is removed after the protein is made
4. DIn the active site

Cells lining the small intestine have tiny finger-like folds of membrane called microvilli. What does this tell you about their job?

1. AThey protect the gut from bacteria by producing mucus
2. BThey make digestive enzymes in large amounts
3. CThey absorb substances, so they need a large surface area
4. DThey move food along by beating like cilia