ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

ما الانتشار؟

1. Aحركة الجسيمات من تركيز أعلى إلى تركيز أدنى
2. Bحركة الماء عبر غشاء باستخدام ATP
3. Cابتلاع الخلية جسيمات كبيرة داخل حويصلة
4. Dحركة الجسيمات من تركيز أدنى إلى تركيز أعلى

What is a genetically modified organism (GMO)?

1. AAn organism that has caught a virus
2. BAn organism produced by normal sexual reproduction between two parents
3. CAn organism whose DNA has been changed by genetic engineering
4. DAn organism that has been grown in a greenhouse

In an enzyme reaction, what is the substrate?

1. AThe part of the enzyme that changes shape
2. BThe product released at the end
3. CThe substance that the enzyme acts on
4. DThe gene that codes for the enzyme

Why can an electron microscope show more detail than a light microscope?

1. AElectrons are brighter than light
2. BElectrons have a much shorter wavelength than light
3. CElectron microscopes use stronger glass lenses
4. DElectron microscopes use living cells only

Red-green colour blindness is X-linked recessive. A colour-blind woman (XᵇXᵇ) has children with a man with normal colour vision (XᴮY). What fraction of their sons is expected to be colour-blind?

1. AAll
2. BOne quarter
3. CNone
4. DOne half

Why do red blood cells have a flattened, biconcave disc shape?

1. AIt helps them divide faster
2. BIt gives a large surface area for gas exchange
3. CIt lets them hold a larger nucleus and more DNA
4. DIt makes them stick to vessel walls

A man has Klinefelter syndrome (XXY). Which error most likely produced it?

1. AExtra mitosis in the zygote after fertilisation
2. BA frameshift mutation in one of the genes on the father's Y chromosome
3. CCrossing over between chromosome 21 and the X chromosome
4. DNondisjunction of the sex chromosomes during meiosis in a parent

Why does cooking oil not mix with water?

1. AOil molecules are polar and repel the charged ends of water molecules
2. BOil molecules are nonpolar and cannot form hydrogen bonds with water
3. CWater molecules are nonpolar and avoid each other
4. DOil is denser than water and sinks