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

What is a monomer?

1. AA small unit that joins with others to form a polymer
2. BA very large molecule that is made of many smaller units
3. CAn enzyme that breaks down polymers
4. DA molecule that contains no carbon

Какие четыре основания входят в состав ДНК?

1. AАденин, урацил, гуанин и цитозин
2. BАденин, тимин, гуанин и цитозин
3. CАденин, тимин, глюкоза и цитозин
4. DАланин, тимин, глицин и цистеин

What is an allele?

1. AA section of DNA between genes
2. BA protein made from a gene
3. CA pair of matching chromosomes from each parent
4. DA different version of the same gene

Какое утверждение описывает активный транспорт?

1. AОн перемещает через мембрану только воду
2. BОн происходит только в мёртвых клетках
3. CОн использует энергию для перемещения веществ против градиента концентрации
4. DОн перемещает вещества по градиенту концентрации без затрат энергии

During which division of meiosis do homologous chromosomes separate?

1. ANeither, because they separate in mitosis
2. BBoth meiosis I and meiosis II
3. CMeiosis I
4. DMeiosis II

Какая последовательность комплементарна цепи ДНК A-T-G-C-C-A?

1. AA-T-G-C-C-A
2. BT-A-C-G-G-T
3. CU-A-C-G-G-U
4. DG-C-A-T-T-G

Griffith injected mice with heat-killed harmful bacteria mixed with live harmless bacteria. The mice died, and live harmful bacteria were found in them. What did this show?

1. AA substance from the dead bacteria changed the harmless ones
2. BThe mice were killed by the dead bacteria alone
3. CBacteria can be killed by the immune system of mice
4. DHeat makes harmless bacteria become harmful when they are injected

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. A10 hours
2. B2 hours
3. C18 hours
4. D0,5 hours