उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

फ़ीनोटाइप क्या है?

1. Aप्रेक्षणीय लक्षण, जैसे आँखों का रंग
2. Bकिसी युग्मक में गुणसूत्रों की संख्या
3. Cकिसी जीन में क्षारकों का क्रम
4. Dकिसी जीन के लिए जीव में उपस्थित एलील का जोड़ा

What does DNA replication produce?

1. AFour different DNA molecules
2. BTwo identical DNA molecules
3. COne mRNA molecule
4. DA new protein

What is a monomer?

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

कौन-सा कथन सक्रिय परिवहन का वर्णन करता है?

1. Aयह सांद्रता प्रवणता के विरुद्ध पदार्थों को ले जाने में ऊर्जा का उपयोग करता है
2. Bयह झिल्ली के पार केवल पानी को ले जाता है
3. Cयह केवल मृत कोशिकाओं में होता है
4. Dयह बिना किसी ऊर्जा के पदार्थों को उनकी सांद्रता प्रवणता के अनुदिश ले जाता है

What happens to a protein when it is denatured?

1. AIt turns into a carbohydrate
2. BIt loses some of its amino acids but keeps its folded shape
3. CIt loses its 3D shape but keeps its amino acid sequence
4. DIt becomes more active than before

What is an inversion mutation?

1. AA chromosome segment breaks off and is reattached the wrong way round
2. BA segment of a chromosome is lost completely
3. CA whole extra chromosome is added to the cell
4. DA segment of a chromosome moves to a different, non-matching chromosome

Potato cylinders are placed in sugar solutions of different strengths. They gain mass in weak solutions, lose mass in strong ones and show no change at 0.3 mol/L. What can be concluded?

1. AThe potato cells have a solute concentration of about 0.3 mol/L
2. BPotato cells are always hypertonic to sugar solutions
3. CThe potato cells contain no water at all
4. DSugar enters the cells only by active transport, not by diffusion

An old idea says giraffes got long necks because each one stretched to reach leaves and passed the longer neck to its young. Why is this idea rejected?

1. ANeck length is not affected by any genes
2. BGiraffes do not eat leaves from tall trees, so stretching is not needed
3. COnly plants can pass on traits to offspring
4. DChanges acquired in a lifetime are not passed on in the genes