Exam 1

Question 1

loctose, or milk sugar is composed of one glucose unit & one galactose unit. it is thus classified as:

Answer 1

disaccharide

Question 2

the typical energy storage form of carbohydrates in animals is

Answer 2

glycogen

Question 3

molecules that contain the element_ are considered organic

Answer 3

carbon

Question 4

which one of the following illustrates hydrolysis?

Answer 4

the reaction of a fat to form glycerol & fatty acids with utilization of water

Question 5

the basic building block molecules that make up carbohydrates

Answer 5

monosaccharides

Question 6

in condensation reactions, the atoms that make up the expelled water are derived from

Answer 6

both the reactants

Question 7

a certain protein molecule consists of 4 subunits: each is a folded polypeptide chain with an alpha helix. Considering this information, which structural levels of organization must the molecule have?

Answer 7

primary, secondary, tertiary, & quaternary

Question 8

saturated fatty acids

Answer 8

have a higher ratio of hydrogen to carbon than do unsaturated

Question 9

the versatility of carbon to serve as the backbone for a variety of different molecules is due to

Answer 9

carbon forms covalent bonds, and has the ability to form 4 covalent bonds

Question 10

_ are molecules that have the same molecular composition but differ in structure and/or bonding association

Answer 10

isomers

Question 11

which of the following is not a monomer subunit of biological macromolecules?

Answer 11

lipids

Question 12

which of the following are polysaschcharides

Answer 12

A,B,C

Question 13

which of the following best summarizes the relationship between dehydration reactions & hydrolysis?

Answer 13

dehydration assemble polymers and hydrolysis breaks them down

Question 14

a pleated sheet is formed when parallel strands of a polypeptide chain are joined by hydrogen bonds. This is an example of

Answer 14

secondary structure

Question 15

which of the following is true of cellulose

Answer 15

it is a major structural component of plant cell walls

Question 16

which of the following descriptions best fits the class of molecules known as nucleotides?

Answer 16

a nitrogenous base, a phosphate group, and a pentose sugar

Question 17

all the places on earth where living organisms are found

Answer 17

biosphere

Question 18

which of the following sequences represents the hierarchy of biological organization from the least to the most complex level

Answer 18

molecule, cell, organ system, population, ecosystem, biosphere

Question 19

in terms of hierarchal organization of life, a bacterium is at the _ level of organization, whereas a human is at the _ level of organization

Answer 19

single celled, multicellular

Question 20

the _ is found both in prokaryotes & eukaryotes

Answer 20

ribosome

Question 21

The_ is associated with intracellular digestion

Answer 21

lysosome

Question 22

which of the following is correctly matched

Answer 22

nucleolus: site of ribosome synthesis

Question 23

the _ is frequently attached to the endoplasmic reticulum

Answer 23

ribosome

Question 24

the_ is the site of enzyme synthesis

Answer 24

ribosome

Question 25

All of that following can be found in prokaryotic cells except

Answer 25

Golgi Apparatus

Question 26

Ribosomes occur in

Answer 26

both prokaryotic & eukaryotic

Question 27

which structure below "packages" substances prior to their removal from the cell by exocytosis?

Answer 27

Golgi apparatus

Question 28

Insulin is a protein secreted by cells of the pancreas. What is the pathway for the syntheisis & secretion of insulin?

Answer 28

Rough ER, Golgi apparatus, vesicle, cell membrane

Question 29

The structure taken from an animal cell most likely to contain hydrolytic enzymes is the

Answer 29

lysosome

Question 30

Which of the following structures is more prominent & more developed in a typical plant cell than in a typical animal cell?

Answer 30

vacuole

Question 31

which of the following are prokaryotic cells?

Answer 31

bacteria

Question 32

which organelle is primarily involved in the synthesis of oils, phospholipids, & steroids

Answer 32

Smooth ER

Question 33

the cell theory states

Answer 33

all of these

Question 34

A cell has the following molecules & structures: enzyme, DNA,ribosomes, cell membrane, & mitochondria. It could be a cell from

Answer 34

a plant or an animal

Question 35

the sodium- potassium pump is an example of

Answer 35

facilitated diffusion

Question 36

An animal cell is placed in an isotonic medium containing glucose. The plasma membrane of the cell has a transport mechanism that is specific for glucose uptake. Assuming that the other solutes neither enter nor leave the cell & that glucose cannot leak back out, which one of the following will occur?

Answer 36

the cell will remain constant

Question 37

Potato cell placed in seawater will

Answer 37

lose water & become flaccid

Question 38

which of the following types of molecules are the major structural components of the cell membrane?

Answer 38

phospholipids & proteins

Question 39

In an attempt to replenish body fluids, a patient who has had a serious hemorrhage accidentally receives a large transfusion of distilled water directly into one of his veins. This would probably

Answer 39

Have serious, perhaps fatal, consequences because the red blood cells would tend to burst

Question 40

facilitated diffusion across a semipermeable membrane

Answer 40

involves passive transport (as opposed to active)

Question 41

active transport

Answer 41

involves a carrier & energy

Question 42

Materials may be taken into cells by the following processes, except

Answer 42

exocytosis

Question 43

all of the following are functions of membrane protiens except

Answer 43

protein synthesis

Question 44

which of the following would likely diffuse through the cell membrane most rapidly?

Answer 44

CO2

Question 45

White blood cells engulf bacteria through what process?

Answer 45

Phagocytosis