उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

किसी प्रयोग में स्वतंत्र चर क्या होता है?

1. Aवह कारक जो हर समूह में समान रखा जाता है
2. Bवह कारक जिसे परिणाम के रूप में मापा जाता है
3. Cवह समूह जिसे कोई उपचार नहीं मिलता
4. Dवह कारक जिसे शोधकर्ता जान-बूझकर बदलता है

What is a monomer?

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

How many millilitres are in one litre?

1. A10 000
2. B1000
3. C10
4. D100

Human adult height varies across a smooth, continuous range rather than falling into a few separate groups. What is the best explanation?

1. AIt is an X-linked recessive trait
2. BIt is controlled only by the environment
3. CIt is controlled by one gene with two alleles and full dominance
4. DIt is controlled by many genes and also affected by environment

What does it mean that a person's blood is Rh negative?

1. ATheir red cells carry extra RhD antigen
2. BTheir red cells lack the A and B antigens
3. CTheir plasma has no antibodies at all
4. DTheir red cells lack the RhD antigen

Why can DNA profiling (fingerprinting) identify individual people?

1. AEach person's genes code for different amino acids
2. BDNA in blood differs from DNA in skin
3. CRepeated non-coding DNA regions vary in length between people
4. DEvery person has a different number of chromosomes in their cells

The lion is Panthera leo, the tiger is Panthera tigris and the house cat is Felis catus. Which two are most closely related?

1. AAll three are equally related
2. BThe lion and the tiger
3. CThe lion and the house cat
4. DThe tiger and the house cat

A dihybrid cross gives offspring in a ratio of about 9 : 3 : 3 : 1. What does this suggest?

1. AThe two genes are tightly linked on the same chromosome
2. BBoth parents are homozygous dominant for both genes
3. CBoth parents are heterozygous for two genes that assort independently
4. DOne parent is AaBb and the other is homozygous aabb