ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is the job of messenger RNA (mRNA)?

1. AIt stores genetic information in the nucleus permanently
2. BIt carries the genetic code from DNA to the ribosomes
3. CIt forms the main structure of the ribosome
4. DIt carries amino acids to the ribosomes

في أي عُضيّة تحدث عملية البناء الضوئي؟

1. Aجهاز غولجي
2. Bالنواة
3. Cالميتوكوندريا
4. Dالبلاستيدة الخضراء

كائن نمطه الجيني Bb. كيف يوصف؟

1. Aأحادي المجموعة الصبغية
2. Bنقي متنحٍّ
3. Cنقي سائد
4. Dخليط الأليلات (متباين الزيجوت)

Which stage of aerobic respiration produces the most ATP?

1. AThe electron transport chain
2. BThe Krebs cycle in the matrix
3. CFermentation
4. DGlycolysis in the cytoplasm

What happens to an enzyme after it has catalysed a reaction?

1. AIt is broken down into amino acids
2. BIt becomes part of the product and leaves with it
3. CIt is released unchanged and can be used again
4. DIt changes into the substrate

ماذا يحدث أثناء النسخ (الاستنساخ)؟

1. Aتُصنع نسخة mRNA من جين انطلاقًا من DNA
2. Bتُربط الأحماض الأمينية عند الريبوسوم
3. Cيُنسخ جزيء DNA كله قبل الانقسام
4. Dيُبنى بروتين من رسالة mRNA

A large molecule contains carbon, hydrogen, oxygen, nitrogen and phosphorus. Its monomers each have a sugar and a base. What type of molecule is it?

1. AA lipid
2. BA nucleic acid
3. CA carbohydrate
4. DA protein

Bacteria grown in heavy nitrogen (¹⁵N) are moved to normal nitrogen (¹⁴N) and allowed to divide once. All their DNA now has a density halfway between heavy and light. Which model of replication does this support?

1. AConservative replication
2. BReplication by RNA copying
3. CSemiconservative replication
4. DReplication without a template