Chapter 4,5,6 Flashcards Preview

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Flashcards in Chapter 4,5,6 Deck (108)
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1

The third step in cellular respiration is:

The electron transport system

2

The Krebs cycle takes place in the:

mitochondria.

3

Which of the following statements is not true of glycolysis?

It is also known as the Krebs cycle.

4

Enzymes are:

proteins.

5

Which of the following activates enzymes by means of an allosteric effect?

kinases

6

Most enzymes:

a. are specific in their action.
b. can alter their function by changing the shape of the molecule.
c. are synthesized as inactive proenzymes.
d. all of the above.

7

In naming enzymes, the root name of the substance whose chemical reaction is catalyzed is followed by

-awe

8

Molecules that are acted upon by enzymes are known as:

Substrates

9

Enzymes that cause essential chemical reactions to occur are called:

catalysts

10

A red blood cell becomes engorged with water and will eventually lyse, releasing hemoglobin into the solution. This solution is __________ to the red blood cell.

hypotonic

11

A saline solution that contains a higher concentration of salt than living red blood cells would be:

hypertonic.

12

An example of a cell that performs phagocytosis is the:

white blood cell.

13

An example of a cell that performs phagocytosis is the:

White blood cell

14

Membrane pumps are an example of which type of movement?

Hypdrostatic pressure

15

The “uphill” movement of a substance through a living cell membrane is:

Active transport

16

Which movement always occurs down a hydrostatic pressure gradient?

Filtration

17

Glycolysis is a catabolic pathway that begins with glucose and ends with:

Pyruvic acid

18

A molecule or other agent that alters enzyme function by changing its shape is called:

an allosteric effector.

19

Osmosis is the __________ of water across a selectively permeable membrane.

Diffusion

20

Movement of substances from a region of high concentration to a region of low concentration is:

Passive transport

21

The energy required for active transport processes is obtained from:

ATP

22

The force of a fluid pushing against a surface could be described as:

hydrostatic pressure.

23

A hypertonic solution is one that contains:

a greater concentration of solute than the cell.

24

The trapping of bacteria by specialized white blood cells is an example of:

phagocytosis

25

Diffusion of water through a selectively permeable membrane in the presence of at least one impermeant solute is referred to as:

Osmosis

26

Which of the following is not a passive transport process?

Pinocytosis

27

The phospholipid area of the plasma membrane of a cell is:

Bylayered

28

Ribosomes are attached to:

Rough endoplasmic reticulum

29

Skin cells are held tightly together by:

desmosomes

30

Movement of the ovum within the female reproductive tract is largely as a result of:

the cilia lining the uterine tubes.