ch2 Prokaryotic cells

Which of the following features helps identify a cell as a eukaryotic cell?

• absence of chloroplasts

• absence of vacuoles

• presence of cell wall

• presence of mitochondria

The diagram shows two different cells.

Which of the following comparisons of cells X and Y is not correct?

• X: genetic material is lying free in the cytoplasm

  Y: genetic material is enclosed in the nucleus

• X: cell wall is absent

  Y: cell wall is present

• X: cytoplasm is present

  Y: cytoplasm is present

• X: nuclear membrane is absent

  Y: nuclear membrane is present

Which of the following statements about the prokaryotic cell is not correct?

• A prokaryotic cell has ribosomes.

• The cell wall of a prokaryotic cell does not contain cellulose.

• A prokaryotic cell has no ER (endoplasmic reticulum).

• A prokaryotic cell does not contain genetic material DNA.

In a eukaryotic cell, DNA is present in the

• nucleus

• ER

• vacuole

• cell wall

All eukaryotic cells have

• a nucleus and chloroplasts.

• a nucleus and mitochondria.

• a cell membrane and mitochondria

• a cell membrane and cytoplasm

Which of the following sub-cellular structures controls the movement of substances in and out of the cell?

• nucleus

• cell membrane

• cell wall

• mitochondrion

Mitochondria are organelles for

• absorbing light energy in photosynthesis

• controlling the movement of substances in and out of the cells

• respiration to release energy.

• controlling activities of the cells

Which of the following combinations of sub-cellular structure and its function is not correct?

• nucleus: control cell activities

• cell wall: gives shape to the cell

• smooth ER: site of respiration

• rough ER: site of protein making