Bio Lab Test 1

Centrosome

maintains shape

Mitochondrion

Makes atp

Ribosome

makes proteins

Cytoplasm

substance between organelles

Golgi apparatus

modifies sorts and packages proteins

Intermediate filament

maintain cell shape

Lysosome

break down waste

Nucleolus

RNA

Nucleus

stores DNA

Perixisome

breakdown of fatty acids

Plasma membrame

controls what goes in and out of a cell

Rough ER

makes proteins

Smooth ER

lipid synthesis, detoxification

Diaphragma

controls light

If the ocular lens is 10× and the objective lens is 40×, what is the total magnification?

400x

Nosepiece

holds the lens

Which objective is typically used first when locating a specimen?

4x

As magnification increases, the field of view generally?

decreases

Condenser

focus light

Which microscope is commonly used to observe living cells without staining?

compound light microscope

How many mm in one cm

10

How many µm (micrometer) to mm (milliliter)

1000

Which unit is most appropriate for measuring the size of a typical bacterium?

micrometer

How many millimeters in one meter

1000

Convert 750 µm to mm

0.75

Convert 0.003 m to mm

3

Convert 2.5 cm to mm

25

A cell is 25 µm wide. What is its width in millimeters?

0.025

Convert 0.8 mm to µm

800

What is the basic structural and functional unit of life?

cell

Which structure controls what enters and leaves the cell? (plant cells)

cell wall

Diffusion is the movement of particles from

high to low

Diffusion is considered a type of

passive transport

Does diffusion move particles against or down their concentration gradient?

down

Oxygen moves from an area where oxygen concentration is high to an area where it is low. This is an example of:

diffusion

What happens to the rate of diffusion when temperature increases?

increases

A drop of food coloring is placed into a beaker of water. Eventually, the color spreads throughout the water. This demonstrates

diffusion

Which factor would generally increase the rate of diffusion?

larger concentration gradient and temperature

At equilibrium, particles

continue moving randomly

Which molecule can commonly cross the phospholipid bilayer by simple diffusion?

oxygen

If there is a very large difference in concentration between two areas, diffusion will initially tend to be:

faster

Which statement correctly compares diffusion and active transport:

diffusion moves down active moves against the concentraton gradient

What does active transport require?

atp

Does active transport move down or against the concentration gradient?

against

Active transport is the movement of particles from

low to high

Whats the order for the units of life?

cell, tissue, organ, organ system, organism

Active transport is considered