ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

Which enzyme adds new nucleotides to build a new DNA strand?

1. ADNA polymerase
2. BHelicase
3. CRNA polymerase
4. DPepsin

أي تركيب يوجد في الخلايا النباتية ولا يوجد في الخلايا الحيوانية؟

1. Aالغشاء الخلوي
2. Bالريبوسوم
3. Cالميتوكوندريا
4. Dالجدار الخلوي

Which characteristic is shared by all living things?

1. AThey make their own food by photosynthesis
2. BThey have a backbone and a brain
3. CThey respond to changes in their environment
4. DThey are made of many cells

Yeast in bread dough breaks down sugar without oxygen. What does it produce?

1. AGlucose and oxygen
2. BOxygen and water
3. CLactic acid and carbon dioxide
4. DEthanol and carbon dioxide

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

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

A study finds a positive correlation between hours of exercise and lung capacity. What does this mean?

1. AAs exercise increases, lung capacity tends to increase
2. BExercise has been proven to cause higher lung capacity
3. CAs exercise increases, lung capacity tends to decrease
4. DThere is no link between the two variables

A cube-shaped cell has sides of 2 µm. What is its surface area-to-volume ratio?

1. A1 : 3
2. B2 : 1
3. C3 : 1
4. D6 : 1

How does a phospholipid differ from a triglyceride?

1. AIt is made of amino acids
2. BOne of the fatty acids is replaced by a phosphate group
3. CIt contains no glycerol, only fatty acids and phosphate
4. DIt has four fatty acids instead of three