उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

What does sterilisation mean?

1. AKilling or removing all microorganisms, including spores
2. BKilling only the viruses on a surface
3. CWashing away visible dirt with water
4. DReducing the number of microbes on the skin before an injection

Which definition of a species is most often used for animals?

1. AAll the animals that eat the same food
2. BAny organisms that look alike
3. CA group that can interbreed and have fertile offspring
4. DAll of the different organisms that live together in one area

What is peer review?

1. AAsking patients for their opinion of a treatment
2. BRepeating your own experiment many times
3. CReading a textbook to learn a topic
4. DExperts checking a study before it is published

What is meant by independent assortment in meiosis?

1. ASister chromatids stay joined until the end of meiosis, so all gametes are identical
2. BDNA is copied separately in each chromosome
3. CAll chromosomes from the mother go into the same gamete
4. DHomologous pairs line up randomly, so gametes get different mixes of chromosomes

In which phase of mitosis do the chromosomes condense and the nuclear envelope break down?

1. ATelophase
2. BMetaphase
3. CAnaphase
4. DProphase

What does RNA polymerase do?

1. AIt copies the whole genome before cell division
2. BIt builds an RNA strand from a DNA template
3. CIt removes introns from pre-mRNA
4. DIt builds a protein from an mRNA template

The antibiotic tetracycline binds to bacterial ribosomes. Which process does it block, and why are human cells much less affected?

1. ATranscription, because human cells have no RNA polymerase of their own
2. BTranslation, because bacterial ribosomes differ from human ribosomes
3. CDNA replication, because bacteria have no DNA polymerase
4. DTranslation, because human cells have no ribosomes

क्रियाधार जैसे आकार वाला एक अणु एंज़ाइम के सक्रिय स्थल से जुड़ जाता है और अभिक्रिया को धीमा कर देता है। उसका प्रभाव कैसे घटाया जा सकता है?

1. Aअभिक्रिया से सारा पानी हटाकर
2. Bसंदमक (इनहिबिटर) की और मात्रा जोड़कर
3. Cक्रियाधार की मात्रा घटाकर
4. Dक्रियाधार की बहुत अधिक मात्रा जोड़कर