ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is a eukaryote?

1. AAn organism that lives only in extreme heat
2. BA virus that infects animal cells
3. CAn organism whose cells have a nucleus
4. DAn organism made of a single cell without a nucleus

Which protein gives strength to skin, tendons and bone?

1. ACollagen
2. BAmylase
3. CHaemoglobin
4. DMyosin

What is cell differentiation?

1. AThe process by which cells become specialised
2. BThe process by which cells die on purpose
3. CThe process by which DNA is copied
4. DThe process by which a cell divides into two

What does RNA polymerase do?

1. AIt removes introns from pre-mRNA
2. BIt builds an RNA strand from a DNA template
3. CIt copies the whole genome before cell division
4. DIt builds a protein from an mRNA template

Which statement best describes biological evolution?

1. AChange in the body of one organism during its lifetime
2. BGrowth of an organism from a single zygote to a fully grown adult
3. CMovement of animals to a new habitat each year
4. DChange in the inherited traits of a population over generations

كيف يُسرّع الإنزيم التفاعل الكيميائي؟

1. Aيرفع درجة حرارة الخلية
2. Bيُستهلك بوصفه متفاعلًا
3. Cيخفّض طاقة التنشيط
4. Dيضيف طاقة إلى النواتج

Two genes lie very close together on the same chromosome. In a test cross, most offspring look like the parents instead of the expected 1:1:1:1 ratio. Why?

1. ABoth genes show incomplete dominance
2. BA frameshift mutation happened in both genes
3. CThe genes are on different chromosomes and assort independently
4. DThe genes are linked and are rarely separated by crossing over

يقرأ كودون في mRNA الشفرة AUG. ما الكودون المضاد في tRNA المقابل؟

1. AUAC
2. BAUG
3. CTAC
4. DGUA