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Biology Final Exam > Exam questions > Flashcards

Exam questions Flashcards

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1
Q

The hydrophobic section of a phospholipid is composed of the

A

Fatty acid tails

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2
Q

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

A

Beta-glucose

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3
Q

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

A

R group

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4
Q

What membrane bound organelle contain carteonids

A

Chromoplast

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5
Q

A plant cell is likely to store starch in

A

Amyloplast

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6
Q

Which of the following would NOT be found in prokaryotic cells

A

Mitochondria

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7
Q

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

A

chloroplast and cell walls

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8
Q

Chloroplast are similar to mitochondria in that:

A
  • they are both enclosed by two cell membranes
  • both have DNA and ribosomes
  • Both multiply by binary fission
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9
Q

An endosymbiont is:

A

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

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10
Q

Genetic analyses indicate that the closet living of mitochondria are:

A

a bacteria named Rickettsia that causes typhus

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11
Q

Which bond in determining protein structure are the strongest

A

Peptide bonds

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12
Q

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

A

It is permeable to ionic substances

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13
Q

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

A

charged

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14
Q

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

A

Bacteria

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15
Q

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

A

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

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16
Q

Miller’s experiment showed that

A

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

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17
Q

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

A

Plasma membrane

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18
Q

An adult that cannot digest milk lacks

A

the lactase enzyme

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19
Q

The weakest bond of those listed below is:

A

Hydrogen bond

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20
Q

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

A

Manufactures proteins

21
Q

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

A

Storage; support and structure

22
Q

An example of a hydrohphobic substance is

A

lipids and fats

23
Q

An example of a hydrophilic substance is

A

Water

24
Q

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

A

Non-cyclic produces NADPH whereas cyclic does NOT produce NADPH

25
Q

What happens during redox reactions?

A
26
Q

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

A
27
Q

Why do we have to breath oxygen

A

O2 is consumed as part of the electron transport chain

28
Q

Energy is the __________

A

ability to do work

29
Q

The products of the light reactions of photosynthesis

A

ATP, O2 and NADPH

30
Q

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

A

ethanol and carbon dioxide

31
Q

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

A

Oxidized

32
Q

Entropy refers to the ________ of a system

A

disorder of randomness

33
Q

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

A

ATP

34
Q

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

A

FAD+

35
Q

The first law of thermodynamics states that

A

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

36
Q

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

A

released as heat

37
Q

The final electron acceptor in the original glucose molecule is:

A

oxygen

38
Q

what’s an effective treatment for cyanide poising

A

there is no treatment must let body absorb cyanide

39
Q

What happens during the fixation phase of the Calvin cycle

A

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

40
Q

Chlorphyll absorbs light principally in the __________ wavelengths.

A

blue and violet

41
Q

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

A

simple diffusion; lower

42
Q

The purpose of splitting H20 during photolysis is to

A

replace electrons given up by the chlorophyll in photosystem II

43
Q

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

A

Genus

44
Q

What DOES NOT occur in the Calvin cycle

A

ADP is phosphoylrated to ATP

45
Q

the electron carrier NAD+ has higher energy because

A

NAD+ is in its reduced form

46
Q

Only heterotrophs require __________ components from the environment

A

chemical

47
Q

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

A

autotrophs or other heterotrophs

48
Q

What chemical produces phototropism

A

auxin

Biology Final Exam (1 decks)

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