ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

ما اللبنات الأساسية (المونومرات) للبروتينات؟

1. Aالأحماض الأمينية
2. Bالنيوكليوتيدات
3. Cالسكريات الأحادية
4. Dالأحماض الدهنية

What is the main role of the cytoskeleton?

1. AIt gives the cell its shape and helps it move
2. BIt stores the genetic code of the cell
3. CIt controls which substances enter the cell
4. DIt joins amino acids into proteins

What is a pathogen?

1. AA medicine that kills bacteria
2. BA cell of the immune system that fights infection
3. CA microorganism or agent that causes disease
4. DA harmless microbe living on the skin

لماذا يكرر العلماء التجربة أو يستخدمون أفرادًا كثيرين؟

1. Aلتقليل أثر الصدفة في النتائج
2. Bلضمان إثبات صحة الفرضية
3. Cلتغيير المتغير المستقل في كل مرة
4. Dلتجنب الحاجة إلى مجموعة ضابطة

When most people in a community are vaccinated, people who cannot be vaccinated are also protected. Why?

1. AThe pathogen mutates into a harmless form
2. BThe vaccine spreads from person to person
3. CThe pathogen has too few hosts to spread easily
4. DVaccinated people make antibodies for others

Why does PCR use a DNA polymerase taken from bacteria that live in hot springs?

1. AIt copies RNA as well as DNA
2. BIt makes the DNA strands stick together
3. CIt works only in the dark, like the bacteria it comes from
4. DIt survives the high temperatures used to separate the strands

An mRNA reads AUG-UUU-GGC-UAA. How many amino acids are in the protein made from it?

1. A2
2. B4
3. C3
4. D12

How does a phospholipid differ from a triglyceride?

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