ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

أي الخلايا تنتج عن الانقسام الاختزالي (الميوزي) عند الإنسان؟

1. Aخلايا الدم الحمراء في نقي العظم
2. Bالبويضات والحيوانات المنوية
3. Cخلايا الجلد
4. Dخلايا الكبد

What are the bacteria called that normally live on the skin and in the gut without causing disease?

1. AVectors
2. BPrions
3. CNormal flora
4. DPathogens

Which enzyme unwinds the DNA double helix and separates the two strands for copying?

1. ALigase
2. BHelicase
3. CLipase
4. DAmylase

By which process does oxygen enter a cell and carbon dioxide leave it?

1. AActive transport by membrane pumps
2. BSimple diffusion through the lipid bilayer
3. CEndocytosis in small vesicles
4. DFacilitated diffusion through glucose carriers

Which list puts these human energy sources in order from fastest to use to longest-lasting store?

1. AGlycogen, then ATP, then fat
2. BFat, then glycogen, then ATP
3. CATP, then glycogen, then fat
4. DATP, then fat, then glycogen

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

1. AAntibodies made after vaccination
2. BThe skin and stomach acid
3. CT cells that recognise one virus
4. DMemory B cells from an earlier infection

The coding part of an mRNA is 900 bases long, including the start codon and the stop codon. How many amino acids are in the protein?

1. A300
2. B299
3. C298
4. D900

Scientists put a human gene into bacteria to make a protein. Why do they use a DNA copy made from the mature mRNA instead of the gene taken straight from human DNA?

1. ABacteria have no ribosomes
2. BBacteria cannot read human codons
3. CBacteria cannot remove introns
4. DHuman DNA has no start codons