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

Che cosa è vero per un allele dominante?

1. AManifesta il suo effetto anche quando è presente una sola copia
2. BManifesta il suo effetto solo quando sono presenti due copie
3. CNon compare mai nel fenotipo
4. DViene sempre ereditato dalla madre

Which codon signals the start of translation in most genes?

1. AUAG
2. BUAA
3. CUGA
4. DAUG

What does DNA replication produce?

1. AA new protein
2. BOne mRNA molecule
3. CFour different DNA molecules
4. DTwo identical DNA molecules

Which type of graph is best for comparing the number of patients with each ABO blood type?

1. AA line graph
2. BA histogram
3. CA scatter plot
4. DA bar graph

Quale affermazione descrive il trasporto attivo?

1. ASposta sostanze a favore del loro gradiente di concentrazione senza usare energia
2. BUsa energia per spostare sostanze contro un gradiente di concentrazione
3. CSposta solo l'acqua attraverso la membrana
4. DAvviene solo nelle cellule morte

Red-green colour blindness is X-linked recessive. A colour-blind woman (XᵇXᵇ) has children with a man with normal colour vision (XᴮY). What fraction of their sons is expected to be colour-blind?

1. AAll
2. BNone
3. COne half
4. DOne quarter

Some chemotherapy drugs stop spindle fibres from forming. Why do they often cause hair loss and damage to the gut lining?

1. AThese cells divide by meiosis instead of mitosis
2. BThese tissues also contain rapidly dividing cells
3. CThese tissues are made only of haploid cells
4. DThese cells have no mitochondria

The antibiotic tetracycline binds to bacterial ribosomes. Which process does it block, and why are human cells much less affected?

1. ADNA replication, because bacteria have no DNA polymerase
2. BTranscription, because human cells have no RNA polymerase of their own
3. CTranslation, because bacterial ribosomes differ from human ribosomes
4. DTranslation, because human cells have no ribosomes