Biologia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

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

1. APhospholipids
2. BHormones
3. CEnzymes
4. DAntibodies

Which of these hormones is a steroid?

1. AGrowth hormone
2. BTestosterone
3. CInsulin
4. DGlucagon

What is an ecosystem?

1. AAll the members of one species in an area
2. BThe weather in a particular region
3. CA single organism together with all of its organs and tissues
4. DThe living things in an area and their non-living surroundings

What happens during telophase of mitosis?

1. AThe DNA is copied for the next division
2. BA nuclear envelope forms around each set of chromosomes
3. CThe sister chromatids are pulled apart
4. DThe chromosomes line up across the middle of the cell

What do the spindle fibres do during cell division?

1. AThey attach to chromosomes and move them to the poles
2. BThey digest the old cell membrane
3. CThey copy the DNA of each chromosome before the cell divides
4. DThey make the new nuclear envelope

What is a bacterial endospore?

1. AA tough, dormant form that survives heat, drying and many disinfectants
2. BA hair-like structure used to swim towards food
3. CA reproductive cell that bacteria use to make new colonies quickly
4. DA small ring of DNA that carries antibiotic resistance genes

Wykres pokazuje, że aktywność enzymu rośnie od 20 °C do maksimum w 37 °C, a potem gwałtownie spada. Jaka jest najlepsza interpretacja?

1. AEnzym działa coraz szybciej wraz ze wzrostem temperatury
2. BTemperatura nie wpływa na aktywność enzymu
3. COptimum wynosi około 37 °C; wyższa temperatura powoduje denaturację
4. DEnzym działa najlepiej w 20 °C i ulega zniszczeniu w 37 °C

One sample of an enzyme is boiled and then cooled to 37 °C. Another is kept at 4 °C and then warmed to 37 °C. Which sample will work at 37 °C?

1. AOnly the sample that was boiled
2. BOnly the sample that was kept at 4 °C
3. CNeither sample will work
4. DBoth samples will work equally well