ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is the main role of carbohydrates in the human diet?

1. ATo provide a quick source of energy
2. BTo form antibodies
3. CTo build muscle tissue
4. DTo carry the body's genetic information

How many micrometres (µm) are in one millimetre?

1. A100
2. B1000
3. C1 000 000
4. D10

What are cilia?

1. AFolds of the inner mitochondrial membrane that make ATP
2. BOpenings in the nuclear envelope
3. CShort hair-like projections that beat in waves
4. DSmall round sacs that hold digestive enzymes

A thermometer gives readings of 36,1, 36,1 and 36,2 °C for a water bath that is really at 37,0 °C. How are these readings best described?

1. APrecise but not accurate
2. BBoth accurate and precise
3. CAccurate but not precise
4. DNeither accurate nor precise

Why do chromosomes condense into short, thick shapes before mitosis?

1. ASo they can be moved apart without tangling or breaking
2. BSo that they can be copied more quickly
3. CSo that they can leave through the nuclear pores
4. DSo that genes can be transcribed more easily

What do the spindle fibres do during cell division?

1. AThey attach to chromosomes and move them to the poles
2. BThey copy the DNA of each chromosome before the cell divides
3. CThey digest the old cell membrane
4. DThey make the new nuclear envelope

Two genes lie very close together on the same chromosome. In a test cross, most offspring look like the parents instead of the expected 1:1:1:1 ratio. Why?

1. ABoth genes show incomplete dominance
2. BA frameshift mutation happened in both genes
3. CThe genes are on different chromosomes and assort independently
4. DThe genes are linked and are rarely separated by crossing over

The antibiotic tetracycline binds to bacterial ribosomes. Which process does it block, and why are human cells much less affected?

1. ATranscription, because human cells have no RNA polymerase of their own
2. BTranslation, because human cells have no ribosomes
3. CDNA replication, because bacteria have no DNA polymerase
4. DTranslation, because bacterial ribosomes differ from human ribosomes