A zoologist who observed that tissue of animal had cell (1839)

• Anton van Leeuwenhock

• Robert Hooke

• Theodore Schwann

• Mattias Schleiden

which of the following cells has the greatest surface-to-volume ratio?

• ostrich egg

• human muscle cell

• human red blood cell

• bacterium

The membranous compartmentalization of a cell

• divides the cell into two equal-sized halves

• requires the presence of a cell wall.

• allows different chemical conditions to be maintained in different parts of the cell.

• is common to both prokaryotes and eukaryotes.

The nucleus of a cell.....

• is surrounded by a single layer of membrane.

• is the primary location of protein synthesis

• is contained within the nucleolus

• contains DNA.

The diagram shows a microscope. What is the part labelled X and what is its function?

• The objective lens and its function is to allow you to see a clear, magnified image.

• The stage and its function is to hold the glass slide.

• The coarse adjustment and its function is to allow you to see a clear, magnified image

• The mirror and its function is to shine light on the glass slide

On a typical microscope, there is a rotating part containing three different objective lenses. What is this part called?

• Focus knob

• Eyepiece

• Stage

• Turret

The complex of proteins and DNA in a nondividing cell is called

• chromatin

• a ribosome

• a lysosome

• a nucleolus

The function of the nucleolus is

• intracellular digestion.

• to manufacture ribosomal RNA.

• to manufacture polypeptides

• to store chromatin

When viewing a sample of onion cells using a microscope, a drop of iodine solution is placed on the onion cells. Select two reasons why this is so.

• Onion cells contain starch.

• To see the cells more clearly.

• To protect the onion cells.

• To keep the onion cells flat.

Function of Golgi apparatus?

• is composed of stacks of membranous vesicles that are continuous with one another.

• stores, modifies, and packages proteins.

• strings together amino acids to produce proteins.

• is the site of carbohydrate breakdown.