उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

What is activation energy?

1. AThe energy plants take in from sunlight
2. BThe heat released when a reaction finishes
3. CThe energy needed to start a chemical reaction
4. DThe energy stored in a molecule of ATP

Which substances are used up in aerobic cellular respiration?

1. AOxygen and water
2. BGlucose and oxygen
3. CGlucose and carbon dioxide
4. DCarbon dioxide and water

अमीनो अम्लों से प्रोटीन किन संरचनाओं पर बनते हैं?

1. Aराइबोसोम
2. Bरसधानियाँ
3. Cलाइसोसोम
4. Dसेंट्रिओल

There are 64 possible codons but only about 20 amino acids. What does this tell you about the genetic code?

1. AEach amino acid has exactly three codons
2. BOnly 20 of the codons are ever used
3. CMost amino acids are coded for by more than one codon
4. DEach codon codes for more than one amino acid at the same time

Which statement best describes biological evolution?

1. AGrowth of an organism from a single zygote to a fully grown adult
2. BChange in the body of one organism during its lifetime
3. CMovement of animals to a new habitat each year
4. DChange in the inherited traits of a population over generations

Researchers randomly assign patients to receive either a new wound dressing or the standard dressing and compare healing times. What type of study is this?

1. AA case report
2. BAn observational study
3. CA survey
4. DA controlled experiment

Five recovery times in days are 5, 6, 6, 7 and 30. Which value best describes a typical recovery time, and why?

1. AThe range of 25, because it shows the spread
2. BThe mean of 10.8, because it uses every value
3. CThe median of 6, because the outlier pulls the mean up
4. DThe maximum of 30, because it shows the worst case

Why are there usually far fewer top predators than herbivores in an ecosystem?

1. ATop predators need less energy than herbivores
2. BEnergy is lost at each step, leaving little for the top level
3. CTop predators reproduce faster than herbivores, so they die sooner
4. DHerbivores eat the young of top predators