ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

ضد أي نوع من الكائنات تكون المضادات الحيوية فعّالة؟

1. Aالبكتيريا
2. Bالفيروسات
3. Cمسببات الحساسية من حبوب اللقاح
4. Dكل أنواع الكائنات الدقيقة بالتساوي

What is transpiration?

1. AThe taking in of CO₂ for photosynthesis
2. BThe movement of sugars through the phloem to the roots
3. CThe growth of roots towards water
4. DThe loss of water vapour from the leaves of a plant

How many micrometres (µm) are in one millimetre?

1. A100
2. B10
3. C1 000 000
4. D1000

What happens to a protein when it is denatured?

1. AIt becomes more active than before
2. BIt loses its 3D shape but keeps its amino acid sequence
3. CIt turns into a carbohydrate
4. DIt loses some of its amino acids but keeps its folded shape

يحمل شخص فصيلة دمه AB مستضدّي A وB كليهما على الكريات الحمراء. ما نوع هذه الوراثة؟

1. Aالسيادة المشتركة
2. Bوراثة مرتبطة بالجنس
3. Cالسيادة التامة لـ A على B
4. Dالسيادة غير التامة

Why are G–C base pairs held together more strongly than A–T pairs?

1. AG–C pairs form three hydrogen bonds, and A–T pairs form two
2. BG–C pairs are joined by strong covalent bonds instead of hydrogen bonds
3. CG and C are both purines, so they fit more tightly
4. DA–T pairs are found only in RNA

Some chemotherapy drugs stop spindle fibres from forming. Why do they often cause hair loss and damage to the gut lining?

1. AThese cells have no mitochondria
2. BThese tissues also contain rapidly dividing cells
3. CThese tissues are made only of haploid cells
4. DThese cells divide by meiosis instead of mitosis

Bacteria from hot springs have enzymes that work best at about 80 °C, while most human enzymes work best near 37 °C. What is the best explanation?

1. ATheir enzymes have structures that stay stable at high temperatures
2. BTheir enzymes do not have an active site, so heat cannot affect them
3. CHigh temperature never affects any enzyme
4. DTheir enzymes are made of lipids, not proteins