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

Which carbohydrate forms plant cell walls and acts as dietary fibre?

1. ALactose
2. BGlucose
3. CCellulose
4. DGlycogen

What is peer review?

1. AReading a textbook to learn a topic
2. BExperts checking a study before it is published
3. CRepeating your own experiment many times
4. DAsking patients for their opinion of a treatment

What does transfer RNA (tRNA) do?

1. AIt joins two DNA strands together
2. BIt copies DNA in the nucleus
3. CIt carries the code out of the nucleus
4. DIt brings amino acids to the ribosome

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

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

How can bacteria pass antibiotic-resistance genes directly to other bacteria?

1. ABy meiosis, forming gametes with new alleles
2. BBy mitosis, sharing copies of their chromosomes with neighbours
3. CBy osmosis, moving genes in water
4. DBy conjugation, transferring plasmids through a pilus

HIV is a retrovirus. What does its enzyme reverse transcriptase do?

1. AIt makes DNA from the virus's RNA
2. BIt makes proteins from the virus's DNA
3. CIt makes RNA from the host's DNA
4. DIt breaks down the host's ribosomes

Quale cambiamento renderebbe più rapida la diffusione attraverso una membrana?

1. AUna temperatura più bassa da entrambi i lati
2. BUna superficie di scambio più piccola
3. CUna membrana più spessa
4. DUna maggiore differenza di concentrazione tra i due lati

Si incrociano due piante di pisello entrambe AaBb. I geni si trovano su cromosomi diversi. Quale frazione della prole dovrebbe mostrare entrambi i caratteri recessivi (aabb)?

1. A1/16
2. B1/4
3. C3/16
4. D9/16