Werkblad Biologie voor toelatingsexamens verpleegkunde met antwoorden

What is a mutagen?

1. ASomething that can cause changes in DNA
2. BA cell that divides without control
3. CA protein that repairs damaged DNA
4. DAn enzyme that copies DNA

Welke vorm heeft een DNA-molecuul?

1. AEen enkele rechte streng
2. BEen platte ring
3. CEen drievoudige helix
4. DEen dubbele helix

Wat is de onafhankelijke variabele in een experiment?

1. ADe factor die als resultaat wordt gemeten
2. BDe factor die in elke groep gelijk wordt gehouden
3. CDe groep die geen behandeling krijgt
4. DDe factor die de onderzoeker bewust verandert

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

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

To insert a human gene into a bacterial plasmid, scientists cut both the gene and the plasmid with the same restriction enzyme. Why?

1. ASo the plasmid loses all its genes
2. BSo the gene is turned into RNA
3. CSo the cut ends match and can join together
4. DSo both pieces become exactly the same length

Yeast in bread dough breaks down sugar without oxygen. What does it produce?

1. AOxygen and water
2. BGlucose and oxygen
3. CLactic acid and carbon dioxide
4. DEthanol and carbon dioxide

Finches on the Galápagos Islands have different beak shapes on islands with different foods. What is the best explanation?

1. AThe birds were all created with the same beak and it never changed
2. BThe beaks changed because the birds chose to eat new food
3. CNatural selection favoured beaks suited to each food source
4. DEach bird changed its beak by using it more

Ignoring crossing over, how many different combinations of chromosomes can one person's gametes have because of independent assortment?

1. A23², about 529
2. B2²³, about 8 million
3. C2 × 23, which is 46
4. D46, one for each chromosome