ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is a chromosome?

1. AA single gene that codes for one protein
2. BA long DNA molecule, packed with proteins, carrying many genes
3. CA small organelle in the cytoplasm that makes ATP for the cell
4. DA strand of RNA that leaves the nucleus

على أي تراكيب تُجمَّع البروتينات من الأحماض الأمينية؟

1. Aالأجسام المركزية
2. Bالجسيمات الحالّة
3. Cالفجوات
4. Dالريبوسومات

What are stomata?

1. ATubes that carry water up the stem
2. BHairs on roots that absorb minerals
3. CSmall pores in leaves that allow gas exchange
4. DGreen structures in the leaf that store starch

Why do root hair cells have long, thin extensions?

1. ATo increase the surface area for absorbing water
2. BTo carry out photosynthesis underground
3. CTo anchor the plant firmly against strong winds and rain
4. DTo store starch for the winter

تطابقت نتائج تجربة مع توقعات الفرضية. ما أفضل استنتاج؟

1. Aثبتت صحة الفرضية في جميع الحالات
2. Bالفرضية مدعومة، لكنها غير مثبتة
3. Cلا حاجة إلى تجارب أخرى أبدًا
4. Dصارت الفرضية الآن قانونًا من قوانين الطبيعة

The human arm, bat wing and whale flipper contain the same set of bones. What does this suggest?

1. AThey share a common ancestor
2. BThey have the same function
3. CThey evolved completely separately
4. DThey are the result of acquired traits

A scientist wants to show that a particular microbe causes a disease. According to Koch's postulates, which step is needed?

1. AThe microbe must be seen in the blood under a light microscope
2. BThe microbe must be found in healthy hosts just as often as in sick hosts
3. CThe disease must be treated successfully with antibiotics
4. DThe microbe grown from a sick host must cause the disease in a healthy host

PCR starts with one double-stranded DNA molecule, and the number of copies doubles each cycle. How many copies are there after 10 cycles?

1. A1024
2. B20
3. C100
4. D512