उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

In the scientific name Homo sapiens, what does Homo name?

1. AThe kingdom
2. BThe genus
3. CThe species
4. DThe family

What is an antigen?

1. AA molecule that the immune system sees as foreign
2. BA drug that kills viruses
3. CA protein that carries oxygen
4. DA white blood cell that engulfs and digests bacteria

What is a monomer?

1. AA small unit that joins with others to form a polymer
2. BAn enzyme that breaks down polymers
3. CA molecule that contains no carbon
4. DA very large molecule that is made of many smaller units

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. Aप्रयोग का निष्कर्ष
2. Bप्रत्येक पौधे को मिलने वाले पानी की मात्रा
3. Cप्रत्येक पौधे को मिलने वाले प्रकाश की मात्रा
4. Dअंत में पौधों की ऊँचाई

When most people in a community are vaccinated, people who cannot be vaccinated are also protected. Why?

1. AThe pathogen mutates into a harmless form
2. BThe vaccine spreads from person to person
3. CVaccinated people make antibodies for others
4. DThe pathogen has too few hosts to spread easily

What is a bacterial endospore?

1. AA reproductive cell that bacteria use to make new colonies quickly
2. BA tough, dormant form that survives heat, drying and many disinfectants
3. CA small ring of DNA that carries antibiotic resistance genes
4. DA hair-like structure used to swim towards food

In the Hershey–Chase experiment, viruses were labelled with radioactive phosphorus in their DNA or radioactive sulfur in their protein. Only the phosphorus entered the infected bacteria. What did this show?

1. AProtein, not DNA, is the genetic material of the virus
2. BViruses contain no DNA at all
3. CDNA, not protein, is the genetic material of the virus
4. DBacteria take up any radioactive substance

In Tay-Sachs disease, a lysosomal enzyme does not work. What happens inside the affected nerve cells?

1. AThe DNA cannot be copied before division
2. BThe cells can no longer make ATP in their mitochondria
3. CThe undigested substance builds up inside lysosomes
4. DThe ribosomes stop making proteins