उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

What is endocytosis?

1. ASplitting the cytoplasm after the nucleus divides
2. BReleasing material from the cell by fusing vesicles with the membrane
3. CTaking material into the cell by folding the membrane around it
4. DMoving water across the membrane by osmosis

What is the main job of the nucleolus?

1. AIt stores water and salts for the nucleus
2. BIt digests worn-out parts of the cell
3. CIt makes ribosomal RNA and builds ribosome parts
4. DIt releases energy from glucose for the nucleus

What is the cytoplasm?

1. AThe fluid found only inside the nucleus
2. BThe stiff outer layer of cellulose that surrounds a plant cell
3. CThe jelly-like contents between the membrane and nucleus
4. DThe space between two neighbouring cells

How does cytokinesis differ between animal cells and plant cells?

1. AOnly animal cells carry out cytokinesis
2. BOnly plant cells carry out cytokinesis
3. CAnimal cells build a cell plate; plant cells pinch in with a furrow
4. DAnimal cells pinch in with a furrow; plant cells build a cell plate

What does Mendel's law of segregation state?

1. AGenes on different chromosomes are always inherited together
2. BDominant alleles are more common in a population than recessive ones
3. CThe two alleles of a gene separate so each gamete gets only one
4. DEach gamete receives both alleles of every gene

Nearly all cells in a person's body contain the same DNA. Why do nerve cells and muscle cells look and work so differently?

1. ADifferent genes are switched on in each type of cell
2. BNerve cells have lost the genes for muscle proteins
3. CEach cell type has a different set of chromosomes
4. DMuscle cells have extra DNA from mitochondria

Under the microscope, homologous chromosomes are moving to opposite poles, and each is still made of two chromatids. Which stage is this?

1. AAnaphase I of meiosis
2. BProphase of mitosis
3. CAnaphase of mitosis
4. DAnaphase II of meiosis

Why are mutations in mitochondrial DNA passed on only from mothers to their children?

1. AOnly women have mitochondria in their cells
2. BSperm cells contain no DNA at all
3. CThe zygote's mitochondria come from the egg
4. DMitochondrial DNA is on the X chromosome