उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

कौन-सी संरचना पादप कोशिकाओं में होती है पर जंतु कोशिकाओं में नहीं?

1. Aराइबोसोम
2. Bकोशिका झिल्ली
3. Cकोशिका भित्ति
4. Dमाइटोकॉन्ड्रिया

यूकैरियोटिक कोशिका का अधिकांश DNA कहाँ पाया जाता है?

1. Aकोशिका झिल्ली में
2. Bलाइसोसोम में
3. Cकेंद्रक में
4. Dकोशिका भित्ति में

गॉल्जी उपकरण का मुख्य कार्य क्या है?

1. Aकोशिकीय श्वसन द्वारा ATP बनाना
2. Bप्रोटीनों में रूपांतरण करना और उन्हें पैक करना
3. Cकोशिका विभाजन से पहले DNA की प्रतिलिपि बनाना
4. Dयह नियंत्रित करना कि कौन-से जीन सक्रिय हों

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

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

In gel electrophoresis, why does DNA move towards the positive electrode?

1. ADNA is pulled by gravity through the gel
2. BDNA has a positive charge from the nitrogen bases it contains
3. CDNA has a negative charge from its phosphate groups
4. DDNA has no charge and moves at random

In disease spread, what is a vector?

1. AAn organism that carries a pathogen between hosts
2. BA medicine that destroys a pathogen in the body
3. CA blood test used to detect antibodies
4. DThe first person to catch a disease

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

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

Griffith injected mice with heat-killed harmful bacteria mixed with live harmless bacteria. The mice died, and live harmful bacteria were found in them. What did this show?

1. AA substance from the dead bacteria changed the harmless ones
2. BHeat makes harmless bacteria become harmful when they are injected
3. CBacteria can be killed by the immune system of mice
4. DThe mice were killed by the dead bacteria alone