ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is an organism's genome?

1. AA single gene on one chromosome
2. BThe proteins made by one cell
3. CThe traits that can be seen
4. DAll of its genetic material

What is an organism's genotype?

1. AThe alleles it carries for a trait
2. BThe number of cells in its body
3. CThe traits that can be seen or measured
4. DThe environment in which it lives

In which stage of the cell cycle does a cell spend most of its time?

1. AProphase
2. BMetaphase
3. CAnaphase
4. DInterphase

Why does ice float on liquid water?

1. AIce molecules are lighter than liquid water molecules
2. BIce is denser than liquid water
3. CIce contains more air than liquid water
4. DHydrogen bonds hold ice in an open, less dense structure

In evolution, what does an organism's fitness mean?

1. AHow many offspring it leaves that survive and reproduce
2. BHow large the organism grows
3. CHow long the organism lives
4. DHow strong and fast the organism is compared with others

Why do plants wilt when the soil around their roots becomes very salty?

1. ASalt makes the root cells swell and burst
2. BThe roots take in too much water
3. CSalt blocks sunlight from reaching the leaves
4. DWater leaves the root cells by osmosis

Mature human red blood cells have no nucleus and no mitochondria. What follows from this?

1. AThey make ATP by aerobic respiration using the oxygen they carry
2. BThey keep making new haemoglobin throughout their life
3. CThey cannot divide and make their ATP by glycolysis only
4. DThey live longer than almost all other body cells

Cystic fibrosis is caused by a faulty CFTR protein, which forms a chloride channel in the cell membrane. Which process is directly affected?

1. AMovement of chloride ions through a membrane protein
2. BCopying of DNA in the nucleus
3. CDiffusion of oxygen molecules through the lipid bilayer
4. DProduction of ATP in the mitochondria