उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

समसूत्री विभाजन (माइटोसिस) से क्या बनता है?

1. Aचार आनुवंशिक रूप से भिन्न संतति कोशिकाएँ
2. Bगुणसूत्र संख्या की आधी वाली दो कोशिकाएँ
3. Cगुणसूत्र संख्या की दोगुनी वाली एक कोशिका
4. Dदो आनुवंशिक रूप से समान संतति कोशिकाएँ

What is the correct order of levels of organisation, from smallest to largest?

1. ACell, tissue, organ, organ system, organism
2. BCell, organ, tissue, organism, organ system
3. COrgan, tissue, cell, organ system, organism
4. DTissue, cell, organ, organism, organ system

What does gel electrophoresis separate?

1. ADNA fragments by size
2. BBlood into plasma and cells
3. CCells by their shape
4. DChromosomes by their colour

Why can DNA profiling (fingerprinting) identify individual people?

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

Why do red blood cells have a flattened, biconcave disc shape?

1. AIt helps them divide faster
2. BIt gives a large surface area for gas exchange
3. CIt lets them hold a larger nucleus and more DNA
4. DIt makes them stick to vessel walls

The results of an experiment do not support the hypothesis. What should the scientist do next?

1. ARevise the hypothesis and test it again
2. BChange the data so they fit the hypothesis
3. CReport that the hypothesis was proven correct
4. DStop doing any further research on the question

A student puts a fertilised plant in a sunny window and an unfertilised plant in a dark cupboard. The fertilised plant grows more. What is the main flaw?

1. AThere was no hypothesis to test
2. BThe student used too much fertiliser on the plant in the window
3. CThe dependent variable was not measured
4. DTwo variables were changed, so the cause is unclear

An Rh-negative mother gives birth to an Rh-positive baby. Why could a later Rh-positive pregnancy be at risk?

1. AHer red cells may become Rh positive after the birth
2. BThe first baby's antibodies remain in her blood and attack her
3. CThe second baby will be unable to make any red cells
4. DShe may have made anti-D antibodies that cross the placenta