smartbook questions

Question 1

The concept that protein molecules embedded in a plasma membrane form a shifting pattern within the phospholipid bilayer is called the _____mosaic model.

Answer 1

fluid

Question 2

With regard to tonicity, two solutions that have the same concentrations of nondiffusible solutes and water are said to be _______

Answer 2

isotonic

Question 3

The salt concentration of human blood is normally 0.9%. Therefore, what happens to red blood cells that are placed in a solution containing 0.01% salt?

Answer 3

hemolysis

Question 4

Which statement best describes the net movement of oxygen across the plasma membrane of a metabolically active animal cell?

Answer 4

Oxygen molecules are being consumed inside the cell, so there is a net movement of oxygen into the cell.

Question 5

The regulation of microtubule assembly is under the control of a microtubule organizing center called the ___

Answer 5

centrosome

Question 6

Which of the following conditions can result from abnormal cilia and/or flagella?

Answer 6

• recurring respiratory infections
• infertility due to lack of egg movement in females
• infertility due to immobile sperm cells in males

Question 7

During cell division of eukaryotic cells, the microtubules of the cytoskeleton form spindle fibers, which assist in _____

Answer 7

movement of chromosomes

Question 8

Adhesion junctions do what?

Answer 8

Connect the cytoskeletons of two adjacent cells

Question 9

Gap junctions do what?

Answer 9

Form communication channels between cells.

Question 10

Tight junctions do what?

Answer 10

Connect cells by a zipper-like barrier

Question 11

The segments of DNA that contain the information needed to produce specific proteins are called____

Answer 11

genes

Question 12

The nuclear envelope of a cell connects most directly to which organelle?

Answer 12

ER

Question 13

Chromatin, which coils tightly during cell division to form chromosomes, is made of which types of molecules?

Answer 13

NUCLEIC ACIDS

PROTEINS

Question 14

the five cellular organelles that are part of the endomembrane system.

Answer 14

lysosomes
Golgi apparatus
vesicles
nuclear envelope
endoplasmic reticulum

Question 15

The overall term for all the chemical reactions that occur in a cell is __

Answer 15

metabolism

Question 16

When an end product of a metabolic pathway inhibits an enzyme that is active early in the pathway, this is called ____inhibition

Answer 16

feedback

Question 17

Another name for the reactant of an enzymatic reaction is the ___

Answer 17

substrate

Question 18

During which part of cellular respiration is carbon dioxide released?

Answer 18

Krebs cycle

Question 19

Glyclosis occurs where?

Answer 19

Cytoplasm

Question 20

Proteins can directly enter the cellular respiration pathways at which stages? Select all that apply.

Answer 20

Krebs and Glycolysis

Question 21

Whats the order of cellular respiration?

Answer 21

Glycolysis, Krebs, ETC

Question 22

The digestion of fats produces ___ , which can be converted to pyruvate to enter glycolysis.

Answer 22

glycerol

Question 23

The removal of an amino group from an amino acid before using it as an energy source is called _____

Answer 23

deamination

Question 24

The electron transport chain is located in what part of eukaryotic cells?

Answer 24

mitochondrial cristae

Question 25

During aerobic cellular respiration, most of the energy that allows a cell to produce ATP is derived from which specific process?

Answer 25

Electrons passing between carrier proteins of the electron transport chain

Question 26

Which of the following are products of yeast fermentation?

Answer 26

alcohol and carbon dioxide

Question 27

In eukaryotic cells, what is the location of the ATP-synthase enzyme complex that produces most of the ATP during aerobic cellular respiration?

Answer 27

Inner mitochondrial matrix

Question 28

Which protein filaments are bundled together to form cilia?

Answer 28

Microtubules

Question 29

In an experiment in the laboratory, a small colored molecule is injected into one cell. Within minutes, the molecule has entered the adjacent cells. What type of junctions connect these cells?

Answer 29

Gap junctions