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

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

1. ANucleic acids
2. BCarbohydrates
3. CProteins
4. DLipids

Which bonds hold the two strands of a DNA double helix together?

1. APeptide bonds between the sugars
2. BDisulfide bonds between the bases
3. CIonic bonds between the phosphates
4. DHydrogen bonds between the bases

Что такое ген?

1. AБелок, копирующий ДНК перед делением клетки
2. BПолный набор всех хромосом клетки
3. CТип клетки, несущей наследственные признаки
4. DУчасток ДНК, кодирующий продукт, например белок

In a food chain, producers hold 10 000 units of energy. Roughly how much is passed on to the primary consumers?

1. AAbout 5000 units
2. BAbout 10 units
3. CAbout 1000 units
4. DAbout 10 000 units

Which element is found in all amino acids but not in carbohydrates?

1. ACarbon
2. BOxygen
3. CHydrogen
4. DNitrogen

A student switches a light microscope from low power to high power. What happens to the field of view?

1. AIt gets larger but less detailed
2. BIt gets smaller and usually darker
3. CIt stays the same size but gets brighter
4. DIt gets larger and brighter

In an onion root tip, 90 of 100 cells are in interphase and 10 are in mitosis. If the whole cell cycle takes 20 hours, about how long does mitosis last?

1. A0,5 hours
2. B10 hours
3. C18 hours
4. D2 hours

Мышечные клетки расходуют много энергии. Какую органеллу вы ожидали бы найти в них в большом количестве?

1. AЛизосомы
2. BХлоропласты
3. CВакуоли
4. DМитохондрии