ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is a chromosomal deletion?

1. AA piece of chromosome that is turned around
2. BAn extra copy of a whole chromosome
3. CThe swap of a single DNA base
4. DThe loss of a piece of a chromosome

Who first used the word "cells" after looking at thin slices of cork under a microscope?

1. ALouis Pasteur
2. BGregor Mendel
3. CRobert Hooke
4. DCharles Darwin

What are the three parts of a nucleotide?

1. AAn amino group, a sugar and a fatty acid
2. BA phosphate, a sugar and a nitrogen base
3. CA glycerol, a phosphate and a fatty acid
4. DA carboxyl group, a base and a lipid

What happens to an enzyme after it has catalysed a reaction?

1. AIt changes into the substrate
2. BIt becomes part of the product and leaves with it
3. CIt is broken down into amino acids
4. DIt is released unchanged and can be used again

A tablet contains 2,5 g of a substance. How many milligrams is this?

1. A0,0025 mg
2. B250 mg
3. C25 mg
4. D2500 mg

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

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

في تجربة دواء، تتلقى مجموعة قرص سكر يشبه الدواء الحقيقي. لماذا؟

1. Aلضمان شفاء كل مريض
2. Bللتحكم في أثر الدواء الوهمي، أي التحسن الناتج عن توقّع المعالجة
3. Cلتوفير المال في الدواء الحقيقي
4. Dلزيادة جرعة الدواء الحقيقي

A mutation changes one amino acid in an enzyme. In which location is the change most likely to stop the enzyme from working?

1. AIn the active site
2. BIn a section that is removed after the protein is made
3. COn the outer surface, far from the active site
4. DIn the gene's stop codon