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

What is the SI base unit of mass?

1. AGram
2. BKilogram
3. CLitre
4. DPound

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

1. APeptide bonds between the sugars
2. BIonic bonds between the phosphates
3. CDisulfide bonds between the bases
4. DHydrogen bonds between the bases

What is the main material in the cell wall of bacteria?

1. ACellulose
2. BChitin
3. CPeptidoglycan
4. DKeratin

Sickle cell disease is caused by a single base change that replaces one amino acid in haemoglobin. What type of mutation is this?

1. AA frameshift mutation
2. BA missense mutation
3. CA nonsense mutation
4. DA silent mutation

How does cytokinesis differ between animal cells and plant cells?

1. AAnimal cells pinch in with a furrow; plant cells build a cell plate
2. BAnimal cells build a cell plate; plant cells pinch in with a furrow
3. COnly animal cells carry out cytokinesis
4. DOnly plant cells carry out cytokinesis

Golden rice was genetically modified to make beta-carotene. What is the aim?

1. ATo make the rice grow faster in cold climates
2. BTo help prevent vitamin A deficiency
3. CTo make the rice resistant to all insects
4. DTo increase the protein content of the rice

Sweating cools the body. Which property of water best explains this?

1. AIt is less dense as ice than as a liquid
2. BIt is a nonpolar solvent
3. CIt has a very low specific heat
4. DIt takes a lot of heat energy to evaporate

Точечная мутация меняет кодон GAA на GAG, и оба кодируют глутаминовую кислоту. К какому типу относится эта мутация?

1. AХромосомная делеция
2. BМолчащая (синонимичная) мутация
3. CМутация со сдвигом рамки считывания
4. DНонсенс-мутация