Midterm question

Question 1

Scientific method

Answer 1

A series of steps designed to help you solve problems nd answer questions

Question 2

A system that resists changes in pH when acid or base is added

Answer 2

Buffer system

Question 3

Iodine

Answer 3

Starch

Question 4

Bioret reagent

Answer 4

Proteins

Question 5

Benedict Reagent

Answer 5

simple sugars

Question 6

Brown Paper

Answer 6

Lipids

Question 7

in diffusion and osmosis molecules move from

Answer 7

Higher to lower concentrations

Question 8

Which is an example of osmosis

Answer 8

movement of water molecules

Question 9

Which of these does require energy

Answer 9

Active transport

Question 10

Because the cell membrane allows some molecules to pass through it but does not others, it is said to be

Answer 10

Selective permeable

Question 11

which of the followings is a function of the cell membrane?

Answer 11

Regulates the movement of material into and out of the cell

Question 12

cell membranes are constructed mainly of

Answer 12

phospholipid bilayers

Question 13

In the lab, the dialysis tubing bag represented

Answer 13

Plasma membrane

Question 14

What are the factors that affect the permeability of substances across the plasma membrane?

Answer 14

size of molecules, change, polarity

Question 15

What structure do plant cells have that animals cells do not that keeps them from bursting in a hypotonic solution?

Answer 15

cell wall

Question 16

If the ocular is 10x and the objective is set 40x, then what is the total magnification of the microscope?

Answer 16

400x

Question 17

Which of the following may be found in eukaryotic cells but not in bacteria?

Answer 17

nucleus

Question 18

large numbers of ribosomes are present in cells that specialize in producing which of the following molecules

Answer 18

proteins

Question 19

The liver involved in detoxification of many poisons and drugs. which of the following structures is primarily involved in this process and therefore abundant in liver cells.

Answer 19

Smooth ER

Question 20

Which organelle would you expect to find in plant cells but not in animal cells

Answer 20

Chloroplast

Question 21

How does an enzyme work to catalyze a reaction

Answer 21

it supplies the energy to speed up a reaction

Question 22

in enzyme-catalyzed reactions, the substrate binds to a very specific site of the enzyme, called

Answer 22

active site

Question 23

Enzymes are composed of what organic molecule?

Answer 23

proteins

Question 24

When an enzyme loses its structure and becomes non-functioning, it is said to be

Answer 24

denatured

Question 25

Enzymes are very specific for the substrate to which they bind. True or false?

Answer 25

True