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

What is an organism's genome?

1. AThe proteins made by one cell
2. BThe traits that can be seen
3. CAll of its genetic material
4. DA single gene on one chromosome

What are restriction enzymes?

1. AEnzymes that cut DNA at specific base sequences
2. BEnzymes that digest fats in the intestine
3. CEnzymes that copy RNA into DNA
4. DEnzymes that join amino acids into proteins

Осмос — это диффузия какого вещества через избирательно проницаемую мембрану?

1. AГлюкозы
2. BБелков
3. CИонов натрия
4. DВоды

Сколько хромосом содержит нормальная яйцеклетка человека?

1. A22
2. B92
3. C23
4. D46

There are 64 possible codons but only about 20 amino acids. What does this tell you about the genetic code?

1. AEach amino acid has exactly three codons
2. BEach codon codes for more than one amino acid at the same time
3. CMost amino acids are coded for by more than one codon
4. DOnly 20 of the codons are ever used

What are introns?

1. ACodons that tell the ribosome to stop translation
2. BCoding sections joined together to form the mature mRNA
3. CNon-coding sections removed from pre-mRNA before translation
4. DShort pieces of DNA made on the lagging strand

Добровольцы выпивают 0, 100 или 200 мг кофеина, и через 30 минут измеряют их частоту сердечных сокращений. Что является зависимой переменной?

1. A30-минутное время ожидания
2. BЧастота сердечных сокращений через 30 минут
3. CДоза кофеина
4. DСами добровольцы

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. ANone of them
2. BMan 1
3. CMan 3
4. DMan 2