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

What are homologous chromosomes?

1. ATwo identical copies of one chromosome made when DNA is replicated
2. BTwo chromosomes that are always the X and the Y
3. CChromosomes that are found only in gametes
4. DA matching pair, one from each parent, that carry the same genes

Which molecules, made by immune cells, bind to specific antigens?

1. APhospholipids
2. BAntibodies
3. CEnzymes
4. DHormones

Perché un virus non è in grado di riprodursi da solo?

1. ANon ha alcun materiale genetico, né DNA né RNA
2. BSi riproduce solo alla luce del sole
3. CSi divide solo per meiosi
4. DHa bisogno dei meccanismi di una cellula ospite per fare copie di sé

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

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

A study finds a positive correlation between hours of exercise and lung capacity. What does this mean?

1. AThere is no link between the two variables
2. BExercise has been proven to cause higher lung capacity
3. CAs exercise increases, lung capacity tends to decrease
4. DAs exercise increases, lung capacity tends to increase

What is a chromosomal translocation?

1. AA piece of a chromosome is copied twice and stays in the same place
2. BA piece of one chromosome attaches to a non-matching chromosome
3. COne DNA base is replaced by another base
4. DA piece of a chromosome is flipped around in place

Bacteria in a closed flask grow quickly at first, but the population then stops increasing. What is the main reason?

1. ANutrients run out and waste products build up
2. BThe flask becomes too cold for growth
3. CThe bacteria change into viruses after many divisions
4. DThe bacteria stop dividing once they reach adult size

Un campione di DNA contiene il 30% di adenina. Quale percentuale delle sue basi è guanina?

1. A20%
2. B70%
3. C30%
4. D40%