Exam questions

Question 1

The hydrophobic section of a phospholipid is composed of the

Answer 1

Fatty acid tails

Question 2

When a molecule of cellulose undergoes [complete] hydrolysis ( that is, broken down to its monomer),, the products are:

Answer 2

Beta-glucose

Question 3

What is the component of an amino acid that determines polar/nonpolar and hydrophobic/hydrophilic

Answer 3

R group

Question 4

What membrane bound organelle contain carteonids

Answer 4

Chromoplast

Question 5

A plant cell is likely to store starch in

Answer 5

Amyloplast

Question 6

Which of the following would NOT be found in prokaryotic cells

Answer 6

Mitochondria

Question 7

Which structures are found in plant cells but NOT animals cells?

Answer 7

chloroplast and cell walls

Question 8

Chloroplast are similar to mitochondria in that:

Answer 8

• they are both enclosed by two cell membranes
• both have DNA and ribosomes
• Both multiply by binary fission

Question 9

An endosymbiont is:

Answer 9

An organism living inside another organism where the relationship may or not be beneficial to each other

Question 10

Genetic analyses indicate that the closet living of mitochondria are:

Answer 10

a bacteria named Rickettsia that causes typhus

Question 11

Which bond in determining protein structure are the strongest

Answer 11

Peptide bonds

Question 12

Which of the following is not a characteristic of a biological membrane

Answer 12

It is permeable to ionic substances

Question 13

substances that are ___________ are the LEAST likely to enter the cell by simple diffusion

Answer 13

charged

Question 14

According to the Endosymbitoic theory, mitochondria and plastids evolved from:

Answer 14

Bacteria

Question 15

Why is starch rich in calories for a human but cellulose is not

Answer 15

Human enzymes can bind to and break alpha 1-4 bonds but not beta 1-4 bonds

Question 16

Miller’s experiment showed that

Answer 16

H2, CH4, NH3, water, heat and electricity were sufficient to produce amino acids

Question 17

What is the most fundamental feature that enables the cell to function as a distinct entity, separate from its environment?

Answer 17

Plasma membrane

Question 18

An adult that cannot digest milk lacks

Answer 18

the lactase enzyme

Question 19

The weakest bond of those listed below is:

Answer 19

Hydrogen bond

Question 20

Which of the following is NOT a function of the plasma membrane

Answer 20

Manufactures proteins

Question 21

Starch’s main function is ________ whereas celluloses main function is ________.

Answer 21

Storage; support and structure

Question 22

An example of a hydrohphobic substance is

Answer 22

lipids and fats

Question 23

An example of a hydrophilic substance is

Answer 23

Water

Question 24

Cyclic and non-cyclic electron flow during photosynthesis differ in what ways?

Answer 24

Non-cyclic produces NADPH whereas cyclic does NOT produce NADPH

Question 25

What happens during redox reactions?

Question 26

At what stage are the reducing agents of NADH and FADH2 oxidized during aerobic cellular respiration

Question 27

Why do we have to breath oxygen

Answer 27

O2 is consumed as part of the electron transport chain

Question 28

Energy is the __________

Answer 28

ability to do work

Question 29

The products of the light reactions of photosynthesis

Answer 29

ATP, O2 and NADPH

Question 30

under anaerobic conditions, yeasts and most plant cells convert pyruvate to:

Answer 30

ethanol and carbon dioxide

Question 31

a molecule that loses an electron becomes _______ in the process.

Answer 31

Oxidized

Question 32

Entropy refers to the ________ of a system

Answer 32

disorder of randomness

Question 33

During cyclical electron flow, the primary function of photosystem I is to make

Answer 33

ATP

Question 34

Which form of FAD+/FADH2 has the least potential energy

Answer 34

FAD+

Question 35

The first law of thermodynamics states that

Answer 35

Energy can be changed from one to the other by it cannot be created or destroyed

Question 36

In respiration, most of the energy in the original glucose molecule is

Answer 36

released as heat

Question 37

The final electron acceptor in the original glucose molecule is:

Answer 37

oxygen

Question 38

what's an effective treatment for cyanide poising

Answer 38

there is no treatment must let body absorb cyanide

Question 39

What happens during the fixation phase of the Calvin cycle

Answer 39

The enzyme Rubsico catalyzes a reaction in which CO2 is incorporated into an organic molecule

Question 40

Chlorphyll absorbs light principally in the __________ wavelengths.

Answer 40

blue and violet

Question 41

Co2 enters the cell by _________ because the concentration of Co2 is ________ inside the cell than outside the cell

Answer 41

simple diffusion; lower

Question 42

The purpose of splitting H20 during photolysis is to

Answer 42

replace electrons given up by the chlorophyll in photosystem II

Question 43

According to the system of taxonomic classification, a family includes more taxa than a

Answer 43

Genus

Question 44

What DOES NOT occur in the Calvin cycle

Answer 44

ADP is phosphoylrated to ATP

Question 45

the electron carrier NAD+ has higher energy because

Answer 45

NAD+ is in its reduced form

Question 46

Only heterotrophs require __________ components from the environment

Answer 46

chemical

Question 47

Heterotrophs but NOT autotrophs need to consume ________ OR _________ to survive

Answer 47

autotrophs or other heterotrophs

Question 48

What chemical produces phototropism

Answer 48

auxin