Biologia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

Na jakich strukturach białka są składane z aminokwasów?

1. ANa centriolach
2. BNa rybosomach
3. CNa wakuolach
4. DNa lizosomach

How many strands does an RNA molecule usually have?

1. AThree
2. BFour
3. COne
4. DTwo

Which group of biomolecules forms the basic bilayer of the cell membrane and also stores long-term energy?

1. ANucleic acids
2. BLipids
3. CCarbohydrates
4. DProteins

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

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

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

What happens when a ribosome reaches a stop codon on the mRNA?

1. ATranslation ends and the protein is released
2. BThe ribosome goes back to the start codon
3. CA special amino acid is added to end the chain
4. DThe mRNA is copied back into DNA

A cube-shaped cell has sides of 2 µm. What is its surface area-to-volume ratio?

1. A3 : 1
2. B1 : 3
3. C2 : 1
4. D6 : 1

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

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