ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

Which elements make up carbohydrates?

1. ACarbon, hydrogen and nitrogen
2. BCarbon, hydrogen and oxygen
3. CCarbon, nitrogen and sulfur
4. DHydrogen, oxygen and phosphorus

What is an allele?

1. AA section of DNA between genes
2. BA pair of matching chromosomes from each parent
3. CA protein made from a gene
4. DA different version of the same gene

What is true of a recessive allele?

1. AIts trait shows only when two copies are present
2. BIt is found only on the X chromosome
3. CIt is always harmful to the organism
4. DIts trait shows whenever one copy is present

Which is the correct way to write the scientific name of the gut bacterium?

1. AEscherichia coli
2. BEscherichia Coli
3. Ccoli Escherichia
4. DEscherichia Coli

What causes cohesion between water molecules?

1. ACovalent bonds between neighbouring molecules
2. BIonic bonds between oxygen atoms
3. CMagnetic forces between hydrogen atoms
4. DHydrogen bonds between neighbouring molecules

The sodium-potassium pump moves ions across the cell membrane. What does one cycle of the pump do?

1. AMoves 3 K⁺ out and 2 Na⁺ in, using ATP
2. BMoves 2 Na⁺ out and 3 K⁺ in, using ATP
3. CMoves Na⁺ in and K⁺ out, without using ATP
4. DMoves 3 Na⁺ out and 2 K⁺ in, using ATP

Why do cells get far more ATP from glucose when oxygen is present than when it is absent?

1. AWithout oxygen only glycolysis runs, giving a net of 2 ATP per glucose
2. BWithout oxygen, glucose cannot enter the cell or be broken down at all
3. COxygen itself is converted into ATP in the mitochondria
4. DWithout oxygen the Krebs cycle runs faster but makes less ATP

Sweating cools the body. Which property of water best explains this?

1. AIt is a nonpolar solvent
2. BIt is less dense as ice than as a liquid
3. CIt takes a lot of heat energy to evaporate
4. DIt has a very low specific heat