Biologia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

What does phloem carry in a plant?

1. AChlorophyll to the stem
2. BCarbon dioxide from the air
3. CWater from the roots only
4. DSugars made in the leaves

What do bacteria use flagella for?

1. AStoring food
2. BMoving from place to place
3. CCopying their DNA
4. DMaking proteins from amino acids

Which feature helps a sperm cell carry out its job?

1. AA flagellum for swimming
2. BA large vacuole for storing water
3. CChloroplasts for making food
4. DA cell wall for protection

During which division of meiosis do homologous chromosomes separate?

1. AMeiosis I
2. BNeither, because they separate in mitosis
3. CBoth meiosis I and meiosis II
4. DMeiosis II

Dolly the sheep was cloned by putting the nucleus of an adult body cell into an egg cell whose nucleus had been removed. Whose nuclear DNA did Dolly have?

1. AAn equal mix of all three sheep
2. BThe sheep that carried the pregnancy
3. CThe sheep that gave the body cell nucleus
4. DThe sheep that gave the egg cell

Identical twins raised in different homes have different body weights. What does this show?

1. AMutations happened in every cell of one twin
2. BThe phenotype depends on environment as well as genotype
3. CThe twins must have different genotypes for body weight genes
4. DBody weight is controlled by a single gene

Some chemotherapy drugs stop spindle fibres from forming. Why do they often cause hair loss and damage to the gut lining?

1. AThese cells divide by meiosis instead of mitosis
2. BThese tissues also contain rapidly dividing cells
3. CThese tissues are made only of haploid cells
4. DThese cells have no mitochondria

Starch and cellulose are both made of glucose. Why can humans digest starch but not cellulose?

1. ACellulose contains no glucose units at all, only fructose
2. BStarch is a protein, and cellulose is a lipid
3. CCellulose dissolves in water but starch does not
4. DHumans lack an enzyme that breaks the bonds in cellulose