Discovering Cells Flashcards

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1
Q

What is the total magnification of a microscope with two lenses when one lens is 15 and the other is 30?

A

450.

because you multiply 15x30.

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2
Q

How does magnification occur in an electron microscope?

A

An electron beam creates the image.

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3
Q

What are the three parts to cell theory?

A

All cells are produced from other cells.
They are the basic unit of structure and function.
All cells are produced from other cells

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4
Q

How does the lens of a light microscope work?

A

Each CONVEX lens bends light to make the object appear larger.

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5
Q

What does the term RESOLUTION refer to?

A

How sharp an image is.

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6
Q

What is the function of the cell membrane?

A

To control what enters and leaves the cell

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7
Q

Which organelle is the control center of the cell?

A

Nucleus

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8
Q

What does the mitochondria do?

A

Covert energy from food to molecules into energy that the cell can use.

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9
Q

Unlike Hooke, Leeuwenhoek observed cells that were…..

A

Alive.

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10
Q

How does a bacterial cell differ from a plant or animal cell?

A

Bacteria do NOT have a nucleus.

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11
Q

Which organelle is found in bacteria cells but also plant and animal cells?

A

Golgi bodies.

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12
Q

Specialized cells are found only in…..

A

Many-celled organisms.

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13
Q

What is the function of the cell wall?

A

To protect and support the cell.

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14
Q

Unlike the cell wall, the cell membrane…

A

Is found in all cells

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15
Q

Which organelles store food and other materials needed by the cell?

A

The vacuole.

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16
Q

Which organelle release chemicals that break down large food particles into smaller ones?

A

Lysosomes

17
Q

The invention of the microscope made it possible for people to discover….

A

Cells.

18
Q

A light microscope that has two or more lenses is called ……. Microscope.

A

Compound

19
Q

A microscope allowed Hooke to see “tiny rectangular rooms” which he called ……. .

A

Cells.

20
Q

Cells are the basic unit of structure and …… In living things.

A

Function

21
Q

According to cell theory, all organisms are made of ……. .

A

Cells.

22
Q

The sharpness of an image produced by a microscope is called …… .

A

Resolution.

23
Q

A lens that is thicker in the center than at the edge is called a …… lens

A

Convex

24
Q

The nucleus of a cell has a thin strands called ……. that contain genetic material.

A

Chromatin

25
Q

Small grain like bodies called ……. produce protein inside cells.

A

Ribosomes

26
Q

Organelles known as …… contain chemicals that break down food particles and old cell parts.

A

Lysosomes

27
Q

Unlike in an animal cell, the genetic material in a bacterial cell is not found in a …… .

A

Nucleus