Biologia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

What is the main job of the cell wall in a plant cell?

1. ATo release energy from glucose
2. BTo control which genes are switched on in the nucleus
3. CTo support the cell and stop it from bursting
4. DTo make proteins for the cell

In which stage of the cell cycle does a cell spend most of its time?

1. AMetaphase
2. BProphase
3. CAnaphase
4. DInterphase

In which form do animals store glucose in the liver and muscles?

1. AChitin
2. BCellulose
3. CStarch
4. DGlycogen

When most people in a community are vaccinated, people who cannot be vaccinated are also protected. Why?

1. AThe pathogen has too few hosts to spread easily
2. BVaccinated people make antibodies for others
3. CThe vaccine spreads from person to person
4. DThe pathogen mutates into a harmless form

Dlaczego bardzo wysoka temperatura powoduje, że większość enzymów przestaje działać?

1. AEnzym porusza się zbyt wolno, by spotkać substrat
2. BEnzym ulega denaturacji: zmienia się kształt jego centrum aktywnego
3. CCiepło sprawia, że enzym natychmiast rozpada się na aminokwasy
4. DSubstrat zamienia się w inny enzym

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

A child's DNA profile has bands A, B, C and D. The mother has bands A and C. Man 1 has bands B and D, man 2 has A and E, and man 3 has C and F. Which man could be the biological father?

1. AMan 1
2. BMan 2
3. CMan 3
4. DNone of them

Why can a scientific hypothesis never be proven true with absolute certainty?

1. ANew evidence could always contradict it in the future
2. BScientists are not allowed to reach any conclusions
3. CHypotheses are only opinions and cannot be tested
4. DEvery experiment contains a mistake