ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

في DNA، يقترن الأدينين دائمًا بأي قاعدة؟

1. Aاليوراسيل
2. Bالغوانين
3. Cالسيتوزين
4. Dالثايمين

What is a haploid cell?

1. AA cell with no nucleus
2. BA cell with one set of chromosomes
3. CA cell with two sets of chromosomes
4. DA cell with an extra chromosome

Which of these is qualitative data?

1. AThe wound is 3 cm long
2. BThe pulse rate is 72 beats per minute
3. CThe patient weighs 68 kg
4. DThe urine sample is dark yellow

The genetic code is described as nearly universal. What does this mean?

1. AEvery cell in the body makes the same proteins
2. BAll organisms have the same number of chromosomes in their cells
3. CThe same codons mean the same amino acids in nearly all organisms
4. DAll organisms have exactly the same genes

Which of these is part of the body's innate (non-specific) defence?

1. AT cells that recognise one virus
2. BThe skin and stomach acid
3. CMemory B cells from an earlier infection
4. DAntibodies made after vaccination

How can bacteria pass antibiotic-resistance genes directly to other bacteria?

1. ABy meiosis, forming gametes with new alleles
2. BBy osmosis, moving genes in water
3. CBy conjugation, transferring plasmids through a pilus
4. DBy mitosis, sharing copies of their chromosomes with neighbours

A breastfed baby receives antibodies from its mother's milk. Why does this protection last only a short time?

1. AThe baby did not make these antibodies and forms no memory cells
2. BThe antibodies from breast milk attack the baby's own red blood cells
3. CThe baby's stomach makes the antibodies more active
4. DThe antibodies turn into memory cells after a few weeks

Which statement correctly compares DNA replication and transcription?

1. AReplication makes RNA from DNA; transcription makes DNA from RNA
2. BReplication copies all the DNA; transcription copies one gene
3. CBoth use thymine and deoxyribose in the new strand
4. DBoth take place on ribosomes in the cytoplasm