ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is a model in science?

1. AA single measurement from an experiment
2. BA simplified representation of a real system
3. CAn exact copy that has no limitations
4. DThe control group of a study

ما الذي تفتقر إليه الخلايا بدائية النواة، كالبكتيريا؟

1. Aالريبوسومات
2. Bغشاء خلوي
3. Cمادة وراثية على شكل DNA
4. Dنواة محاطة بغشاء

What is an antigen?

1. AA white blood cell that engulfs and digests bacteria
2. BA molecule that the immune system sees as foreign
3. CA drug that kills viruses
4. DA protein that carries oxygen

What is a prion?

1. AA very small virus with a DNA genome
2. BA fungal spore that infects the brain
3. CA bacterium without a cell wall that lives inside nerve cells
4. DA misfolded protein that causes normal proteins to misfold

ما الكودون (الشفرة الثلاثية)؟

1. Aبروتين يبدأ النسخ
2. Bقاعدة واحدة تشفّر بروتينًا
3. Cمجموعة من ثلاث قواعد في mRNA تشفّر حمضًا أمينيًا واحدًا
4. Dالجزء من الصبغي الذي ترتبط به ألياف المغزل أثناء الانقسام المتساوي

Why does each type of virus infect only certain kinds of cells?

1. AIt must attach to specific receptor proteins on the cell surface
2. BIt must find cells with the same DNA as its own
3. CIt can only enter cells that are dividing by meiosis at that time
4. DIt can only enter cells that have no nucleus

Why can a scientific hypothesis never be proven true with absolute certainty?

1. ANew evidence could always contradict it in the future
2. BEvery experiment contains a mistake
3. CHypotheses are only opinions and cannot be tested
4. DScientists are not allowed to reach any conclusions

A human body cell has 46 chromosomes in G1. How many chromatids does it have at metaphase of mitosis?

1. A46
2. B23
3. C92
4. D184