Биология для вступительных экзаменов на сестринские программы: лист заданий с ответами

Which elements make up carbohydrates?

1. AHydrogen, oxygen and phosphorus
2. BCarbon, hydrogen and oxygen
3. CCarbon, nitrogen and sulfur
4. DCarbon, hydrogen and nitrogen

Which of these diseases is caused by a virus?

1. AAthlete's foot
2. BMalaria
3. CTuberculosis
4. DInfluenza

Какое основание встречается в РНК, но не в ДНК?

1. AАденин
2. BТимин
3. CУрацил
4. DГуанин

Что такое мутация?

1. AСпаривание гомологичных хромосом
2. BИзменение последовательности оснований в ДНК
3. CИзменение числа клеток в ткани
4. DНормальное копирование ДНК перед делением

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

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

Drugs against fungal infections often cause more side effects than drugs against bacteria. Why?

1. AFungal cells are eukaryotic, like human cells
2. BFungi are much smaller than bacteria
3. CFungi have no cell membrane for drugs to act on
4. DFungi reproduce only by binary fission

Potato cylinders are placed in sugar solutions of different strengths. They gain mass in weak solutions, lose mass in strong ones and show no change at 0,3 mol/L. What can be concluded?

1. AThe potato cells contain no water at all
2. BSugar enters the cells only by active transport, not by diffusion
3. CPotato cells are always hypertonic to sugar solutions
4. DThe potato cells have a solute concentration of about 0,3 mol/L

A drug lowered blood pressure in a study of 20 men aged 40 to 50. Why might the result not apply to women over 70?

1. AThe study had a dependent variable
2. BThe results were too precise to be trusted
3. CThe sample did not represent that group
4. DBlood pressure cannot be measured in older women