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

Which sugar is found in DNA?

1. AGlucose
2. BDeoxyribose
3. CRibose
4. DFructose

How many micrometres (µm) are in one millimetre?

1. A1000
2. B100
3. C1 000 000
4. D10

In biology, what is a clone?

1. AAn organism that carries genes from two different species
2. BAn offspring of two different parents
3. CA genetically identical copy of an organism, cell or gene
4. DA cell with an extra chromosome

In gel electrophoresis, why does DNA move towards the positive electrode?

1. ADNA has no charge and moves at random
2. BDNA has a positive charge from the nitrogen bases it contains
3. CDNA is pulled by gravity through the gel
4. DDNA has a negative charge from its phosphate groups

What are introns?

1. ANon-coding sections removed from pre-mRNA before translation
2. BShort pieces of DNA made on the lagging strand
3. CCoding sections joined together to form the mature mRNA
4. DCodons that tell the ribosome to stop translation

Which body system works with the respiratory system to deliver oxygen to body cells?

1. AThe digestive system
2. BThe urinary system
3. CThe skeletal system
4. DThe circulatory system

Why do cells get far more ATP from glucose when oxygen is present than when it is absent?

1. AWithout oxygen, glucose cannot enter the cell or be broken down at all
2. BWithout oxygen only glycolysis runs, giving a net of 2 ATP per glucose
3. CWithout oxygen the Krebs cycle runs faster but makes less ATP
4. DOxygen itself is converted into ATP in the mitochondria

Ученик вносит удобрение под 2 томата, а под 2 других — нет. Удобренные растения вырастают выше. В чём главная слабость вывода о том, что удобрение увеличивает рост?

1. AРазмер выборки слишком мал, чтобы исключить случайность
2. BВысоту нельзя точно измерить
3. CУдобрение следовало внести под все четыре растения
4. DНе было независимой переменной