ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is a scientific law?

1. AA rule that scientists vote to accept
2. BAn explanation that has been proven wrong
3. CA statement of what always happens under certain conditions
4. DA guess about the cause of something that has not yet been tested

Which definition of a species is most often used for animals?

1. AA group that can interbreed and have fertile offspring
2. BAll of the different organisms that live together in one area
3. CAny organisms that look alike
4. DAll the animals that eat the same food

أين يوجد معظم DNA في الخلية حقيقية النواة؟

1. Aفي النواة
2. Bفي الغشاء الخلوي
3. Cفي الجدار الخلوي
4. Dفي الجسيمات الحالّة

Why do many plants close their stomata on hot, dry days?

1. ATo reduce water loss
2. BTo release more oxygen
3. CTo take in more carbon dioxide
4. DTo speed up photosynthesis

What happens in the lytic cycle of a virus?

1. AThe host cell makes antibodies against the virus
2. BThe virus makes many copies in the host cell, which then bursts
3. CThe viral DNA joins the host DNA and stays inactive for a long time
4. DThe virus divides by binary fission outside the cell

Why do plants wilt when the soil around their roots becomes very salty?

1. ASalt makes the root cells swell and burst
2. BThe roots take in too much water
3. CWater leaves the root cells by osmosis
4. DSalt blocks sunlight from reaching the leaves

Which statement correctly compares DNA replication and transcription?

1. AReplication copies all the DNA; transcription copies one gene
2. BBoth use thymine and deoxyribose in the new strand
3. CBoth take place on ribosomes in the cytoplasm
4. DReplication makes RNA from DNA; transcription makes DNA from RNA

How does a phospholipid differ from a triglyceride?

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