ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

في التجربة، ما المتغير المستقل؟

1. Aالعامل الذي يغيّره الباحث عمدًا
2. Bالمجموعة التي لا تتلقى معالجة
3. Cالعامل الذي يبقى ثابتًا في كل المجموعات
4. Dالعامل الذي يُقاس بوصفه النتيجة

What are restriction enzymes?

1. AEnzymes that cut DNA at specific base sequences
2. BEnzymes that join amino acids into proteins
3. CEnzymes that copy RNA into DNA
4. DEnzymes that digest fats in the intestine

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

1. Aالريبوسوم
2. Bالجدار الخلوي
3. Cالميتوكوندريا
4. Dالغشاء الخلوي

Which body system works with the respiratory system to deliver oxygen to body cells?

1. AThe urinary system
2. BThe digestive system
3. CThe skeletal system
4. DThe circulatory system

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

1. AOxygen and water
2. BLactic acid and carbon dioxide
3. CEthanol and carbon dioxide
4. DGlucose and oxygen

What do nitrogen-fixing bacteria do?

1. AThey release nitrogen gas from dead organisms into the air
2. BThey break down proteins into glucose
3. CThey turn carbon dioxide into sugar
4. DThey convert nitrogen gas into compounds that plants can use

A linear DNA molecule is fully cut by a restriction enzyme, giving fragments of 500, 300 and 200 base pairs. How long was the original molecule?

1. A300 base pairs
2. B1000 base pairs
3. C1500 base pairs
4. D500 base pairs

An old idea says giraffes got long necks because each one stretched to reach leaves and passed the longer neck to its young. Why is this idea rejected?

1. AGiraffes do not eat leaves from tall trees, so stretching is not needed
2. BChanges acquired in a lifetime are not passed on in the genes
3. CNeck length is not affected by any genes
4. DOnly plants can pass on traits to offspring