Scheda di esercizi di Biologia per i test di ammissione a infermieristica con soluzioni

Quanti cromosomi ha una tipica cellula somatica umana?

1. A92
2. B46
3. C44
4. D23

What is a haploid cell?

1. AA cell with no nucleus
2. BA cell with one set of chromosomes
3. CA cell with two sets of chromosomes
4. DA cell with an extra chromosome

What are the parts of a triglyceride (a fat molecule)?

1. AOne amino acid and three fatty acids
2. BTwo glycerols and one fatty acid
3. CThree glucose units and one phosphate
4. DOne glycerol and three fatty acids

Human adult height varies across a smooth, continuous range rather than falling into a few separate groups. What is the best explanation?

1. AIt is controlled by one gene with two alleles and full dominance
2. BIt is an X-linked recessive trait
3. CIt is controlled by many genes and also affected by environment
4. DIt is controlled only by the environment

By which process does oxygen enter a cell and carbon dioxide leave it?

1. AActive transport by membrane pumps
2. BFacilitated diffusion through glucose carriers
3. CEndocytosis in small vesicles
4. DSimple diffusion through the lipid bilayer

What is a prion?

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

HIV infects and destroys helper T cells. Why do people with untreated advanced HIV get infections that healthy people rarely get?

1. AHelper T cells make the antibiotics that the body needs to fight infection
2. BThe virus turns harmless microbes into pathogens
3. CHIV kills the normal flora of the skin and gut
4. DTheir immune response is too weak to control normally harmless microbes

A single-celled organism has a nucleus, no cell wall and swims using cilia. In which group is it best placed?

1. AProtists
2. BFungi
3. CBacteria
4. DPlants