Quarter 2 Test

Question 0

How big are most cells?

Answer 0

1 mircometer to 1,000 mircometer

Question 1

What unit of measure is used to measure a cell?

Answer 1

Micrometer

Question 2

cell membrane name three things

Answer 2

• Every cell has a boundary that separates the inside from the outside

It’s a protective covering that encloses the entire cell.
Any material coming into or out of the cell must pass through the cell membrane
Contains the cytoplasm

Question 3

cytoplasm name two things

Answer 3

Located inside the cell membrane is a gelatin-like material

Most of the work of the cell is carried out in the cytoplasm.

Question 4

Scientists separate cells into two broad categories based on what key difference;

Answer 4

the location of the genetic material cells need to reproduce and function.

Question 5

eukaryotic cell

Answer 5

the genetic material is in a structure called the nucleus, a structure enclosed by its own membrane.

Question 6

organelle .

Answer 6

Is used to describe any part of a cell that is enclosed by membrane

Question 7

•prokaryotic cell

Answer 7

there is no separate compartments for the genetic material. Instead, it is in the cytoplasm. There are no organelles

Question 8

Most unicellular organisms are

Answer 8

prokaryotic cells.

Question 9

Almost all multicellular organisms are.

Answer 9

eukaryotic

Question 10

The invention of the light microscope led to what?

Answer 10

the discovery of cell and to the development of cell theory.

Question 11

In light microscopes, lenses are used to do what?

Answer 11

bend light and make objects appear bigger than they are and can magnify objects up to 1000 times.

Question 12

Cell samples are treated with dyes to do what?

Answer 12

make structures in the cells easier to see. They also use video cameras and computer processing to observe the movements of cell part and materials within cells.

Question 13

One important advantage of light microscopes is what?

Answer 13

That scientists can observe living cells with them.

Question 14

Two other types of microscopes that are important in the study of cells are

Answer 14

The scanning electron microscope (SEM) and the transmission electron microscope (TEM)

Question 15

Why do we need to use a SEM And TEM microscope?

Answer 15

The light microscope can be used to see objects that are larger than 0.2 micrometers.

the SEM and TEM can be used for looking at the details of the cell

Question 16

both the SEM and TEM, see tiny particles called

Answer 16

electrons, not light, are used to produce images.

Question 17

The advantage of the SEM and Tem microscopes is what?

Answer 17

is that they can magnify objects up to a million times.

Question 18

The disadvantage of the SEM and TEM

Answer 18

they cannot be used to study living specimens.

Question 19

What must happen to the cell To be viewed with a SEM,

Answer 19

A cell sample is coated in a heavy metal, such as gold. Then a beam of electrons is run back and forth over the surface of the cell. The electrons bounce off the coating and are read by a detector that produces a 3-dimensional image of the surface.

Question 20

How can a cell be viewed with a TEM

Answer 20

A cell is sliced extremely thin. Electrons pass through a section. Images produced by a TEM appear 2-dimensional.