ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What does transfer RNA (tRNA) do?

1. AIt brings amino acids to the ribosome
2. BIt joins two DNA strands together
3. CIt copies DNA in the nucleus
4. DIt carries the code out of the nucleus

وفقًا للنظرية الخلوية، من أين تأتي الخلايا الجديدة؟

1. Aمن المعادن في الغذاء
2. Bمن خلايا موجودة مسبقًا
3. Cمن مادة غير حية في الجسم
4. Dمن فيروسات تدخل الجسم

What does the polymerase chain reaction (PCR) do?

1. AIt makes many copies of a piece of DNA
2. BIt separates proteins by their charge
3. CIt cuts DNA at specific sequences
4. DIt turns RNA into protein

Which statement about Archaea is correct?

1. AThey are eukaryotes that have a nucleus and membrane-bound organelles
2. BThey are prokaryotes, and many live in extreme environments
3. CThey are a type of virus
4. DThey are multicellular plants

Golden rice was genetically modified to make beta-carotene. What is the aim?

1. ATo increase the protein content of the rice
2. BTo help prevent vitamin A deficiency
3. CTo make the rice grow faster in cold climates
4. DTo make the rice resistant to all insects

Why are stains such as iodine or methylene blue added to cells on a microscope slide?

1. ATo make the cells larger
2. BTo keep the cells alive for longer
3. CTo make the cells divide
4. DTo make structures easier to see

A point mutation changes a codon in the middle of a gene into a stop codon. What is the most likely effect?

1. AA protein with one different amino acid
2. BNo change, because stop codons are ignored
3. CA shortened protein that usually does not work
4. DA protein that is longer than normal

يشرب متطوعون 0 أو 100 أو 200 mg من الكافيين، ثم يُقاس معدل ضربات قلبهم بعد 30 دقيقة. ما المتغير التابع؟

1. Aالمتطوعون أنفسهم
2. Bزمن الانتظار البالغ 30 دقيقة
3. Cمعدل ضربات القلب بعد 30 دقيقة
4. Dجرعة الكافيين