Test 3

1.

1 point

If you were floating in space and couldn't breathe, your body would undergo what processes give you energy?

Cellular respiration

Glycolysis and alcoholic fermentation

Lactic acid fermentation

Glycotysis and lactic acid fermentation

Krebs cycle

2.

1 point

Suppose you've taken a drug for some disease, and this drug has an annoying side effect because it contains a molecule that interferes with building nuclear membranes. What phase(s) of cell division would be affected by this drug?

Prophase of mitosis

Prophase I & II of meiosis

Prophase of mitosis & prophase I of meiosis

Prophase of mitosis & prophase I & II of meiosis

Telophase of mitosis & telophase I & II of meiosis

3.

1 point

Which of the following scenarios could not happen because it violates the 2nd law of thermodynamics?

Energy is added to a chemical reaction

The amount of energy within a system decreases uncontrollably

An exergonic reaction happens by itself

An organism creates a highly ordered living area for itself

Two molecules react with each other, and all the energy from one molecule goes into the other.

4.

1 point

Which of the following molecules would be considered a steroid?

fatty acid

lipid

human growth hormone

cholosterol

amino acid

5.

1 point

In glycolysis, NADH molecules are created. Where do these molecules go next?

Electron transport chain

Pyruvate oxidation

Krebs cycle

P700

Fermentation

6.

1 point

Think about what endergonic reactions require, and choose which of the following reactions is most likely exergonic

Glycolysis

Calvin cycle

Electron transport chain I of photosynthesis

Krebs cycle

Electron transport chain of respiration

7.

1 point

At what point in the cell cycle would you not be able to tell different chromosomes apart at them?

Prophase

Telophase

Anaphase

All of mitosis

S phase

8.

1 point

At which Point in interphase or mitosis would there be no chromatids?

G2 phase

Metaphase

Early prophase

Late prophase

Anaphase

9.

1 point

Which of the following processes does not occur inside an organelle?

Pyruvate oxidation

Glycolysis

P680

Krebs cycle

Electron transport chains of photosynthesis

10.

1 point

Two chromosomes in a homologous pair have...

the same genes but maybe not the same alleles

different genes and different alleles

the same alleles but maybe not the same genes

alleles from the same parent

t he same genes and the same alleles

11.

1 point

Which of the following molecules is most similar to a molecule of ATP?

Glucose

NADH

Pyruvate

RNA nucleotide

Chlorophyll

12.

1 point

What is the difference between a cilium & a flagellum?

A cilium has more protein microtubules

A flagellum has more protein microtubules

Cilia are found in eukaryotic cells; flagella are found in prokaryotic cells

Flagella are used for cellular motion; cilia are not.

Flagella are larger than cilia

13.

1 point

When animals undergo respiration, they actually help plants a little buit. What part(s) of repiration relase(s) molecules that plants need for phtotsynthesis?

Pyruvate oxidation & Krebs cycle

All four parts

Glycolysis & electron tansport chain

Glycolysis

All parts except pyruvate oxidatuion

14.

1 point

Which of the following molecules would not be able to power an electron transport chain?

A molecule that donates electrons

ATP

FADH^2

A molecule that donates hydrogen (H) atoms

NADPH

15.

1 point

The correct plural form of the word "flagellum" is...

flagella

flagellums

flagellae

flagellum

flafelli

16.

1 point

If a plant cell was unable to form a cell plate, how would this affect mitosis/cytokinesis?

The chromosomes would not be able to line up evenly at metaphase.

There would be no framework around which to reform the nucleus.

It wouldn't affect anything because plant cells don't form a cell plate.

The cleavage furrow would form unevenly

The cell would not be able to divide into two daughter cells.

17.

1 point

Suppose we set up a system in a lab where plants are automatically injected with all the glucose they need to survive What part of photosynthesis would the plants no longer need to perform?

P700

Electron transport chain

The entire light reaction

The entire dark reaction

All of it

18.

1 point

What cells have a plasma membrane?

Eukaryotic cells but not prokaryotic cells

All cells except plant cells

All cells

Only animal cells

Only cells in multicellular organisms

19.

1 point

if the sun randomly went out today, what part(s) of photosynthesis would be directly shut down?

Electron transport chain I & II

Colvin cycie

Krebs cycle

P680 and P700

P680

20.

1 point

. If the smooth ER packages up some molecule and ships it off in a vesicle, where will it probably go next?

Nucleus

Lysosome

Plasma membrane

Outside the cell

Goigi apparatus

21.

1 point

Shutting down what part of photosynthesis would damage animal life most directly and immediately?

Calvin cycle

Krebs cycle

Electron transport chain II

P700

P680

22.

1 point

How many chromosomes are present in a human egg cell after the 2'd cytokinesis of meiosis?

46

64

22

32

23

23.

1 point

If a plant was deprived of glucose, what would happen?

It would perform lactic acid fermentation instead of respiration

It would make its own glucose and be perfectly healthy

Its chtoroplasts would no longer function correctly

Photosynthesis would stop occurring, causing the leaves to change color

It would perform alcoholic fermentation instead of respiration

24.

1 point

In the electron transport chain of cellular respiration, where do the electrons come from?

P680

NADH

NADH & FADH^2

FADH^2

Chlorophyll

25.

1 point

A molecule of RNA has 400 nucleotides and 110 guanines. How many adenines does it have?

90

110

180

0

400

26.

1 point

Which of the following organelles would you find in a prokaryotic cell?

Nucleus

Mitochondria

Chloroplasts

Ribosomes

All of the above

27.

1 point

Which of the following molecules would be considered a steroid?

Fats

steroids

RNA

Cholsterol

Cellulose

28.

1 point

Suppose a stem cell in your body is dividing to become a multinucleate muscle cell. What processes will happen?

. Meiosis I, meiosis II, & cytokinesis

Meiosis I & meiosis II

Meiosis I only

Mitosis & cytokinesis

Mitosis only

29.

1 point

If your dad contributes a chromosome to you, and your mom contributes a different version of the same chromosome to you, what are these two versions called?

A homologous pair

Sister chromatids

Matching chromosomes

A doubled chromosome

Somatic chromosomes

30.

1 point

What is a pilus?

a stick outer coating in eukaryotic cells

a long "tail" that functions like a propeller in eukaryotic cells

a long "tail" that functions like a propeller in prokaryotic cells

a hair-like projection used by prokaryotic cells for attachment during mating

a type of cell wall found in prokaryotic cells

31.

1 point

In which two phases of mitosis would you find a nuclear membrane (or at least fragments of it)?

Prophase & metaphase

Prophase & telophase

Metaphase & anaphase

Prophase & anaphase

Telophase & anaphase

32.

1 point

Plants do have to eat a little bit to take up other nutrients, but they don't have to eat to get most of their energy because they can...

take up carbon dioxide from the air

pull up nutrients from the soil

make glucose through photosynthesis

produce oxygen through photosynthesis

catch animals and eat them

33.

1 point

Which of the following statements is true about chromosomes 12A & 12B in your body during G1 phase?

Each one of them is doubled

Together, they make up one doubled chromosome

They are chromatids

They have the same alleles

They have the same genes

34.

1 point

Why do you always have two versions of each chromosome in your somatic cells?

So one version can go into each daughter cell whenever the cell divides.

So you ave a backup copy of each chromosome in each case one has a mutation.

Your cells are created by meiosis, which doubles each chromosome

Your cells are created by mitosis, which doubles each chromosome

You have one from your father and one from your mother.

35.

1 point

If the thylakoid membrane was permanently permeable to H' ions, what would happen?

The electrons would not be able to jump among the channel proteins

The ions would immediately bond with NADPH

There would be no energy to excite the electrons

Carbon dioxide would not be produced

No ATP/NADPH would be created because the I-1* ions would leak across the membrane.

36.

1 point

Think about the following molecule: Starch, DNA, & protein. What do they all have in common?

They're all polymers

they all contain phosphorus

they're all polysaccharides

the all contain nitrogen

they're all monomers

37.

1 point

Let's say an animal cell is bringing in lipid molecules for energy What organelle would break the lipid molecules apart?

Lysosome

Ribosome

Vacuole

Smooth ER

Golgi apparatus

38.

1 point

Which of the following processes does not create a molecule that can power an endergonic reaction?

Pyruvate oxidation

Alcoholic fermentation

Electron transport chain II of photosynthesis

Electron transport chain of respiration

Glycolysis

39.

1 point

Let's say you try to raise a rain forest plant in a desert environment. Which part of the plant's photosynthesis is going to get screwed up by this?

P700

Electron transport chain I

P680

Electron transport chain II

Calvin cycle

40.

1 point

What would happen to a person who had no access to glucose (or a similar sugar that could take the place of glucose)?

The person's respiration process would be less efficient and less ATP would be produced

Pigment molecules (like melanin) would attempt to carry out photosynthesis

The person would die

The person would undergo fermentation instead of respiration

The person's photosystems would not work correctly

41.

1 point

Why are cells so small?

They must be able to fit in tight places

There must be a lot of them inside your body so your body can afford to lose a few without suffering.

The plasma membrane is too thin to support a large cell.

If a cell rows too big in volume, the plasma membrane won't be big enough to bring in the materials needed to support the cell.

They can't outgrow their cell wall.

42.

1 point

What is the difference between ETC I in photosynthesis and the ETC in respiration?

ETC I in photosynthesis gets its electrons from NADH, in respiration they come from FADH2

ETC I in photosynthesis produces NADH; in respiration it produces ATP

ETC I in photosynthesis gets its electrons from P680; in respiration they come from NADH & FADH2.

ETC I in photosynthesis happens in the outer mitochondrial membrane; in respiration it happens in the inner membrane

ETC I in photosynthesis directly requires light; ETC in respiration does not.

43.

1 point

Let's say a plant cell is bringing in lipid molecules for energy. What organelle would break the lipid molecules apart?

Mitochondrion

Endoplasmic reticulum

Golgi apparatus

Lysosome

Vacuole

44.

1 point

A molecule of DNA has 500 nucleotides and 100 cytosines. how many uracils does it have?

0

500

400

300

We don't have enough information to answer the question

45.

1 point

Which of the following statements about cytokinesis is true?

It is not part of mitosis but can start happening during mitosis

It is the last phase of mitosis.

It always happens after mitosis

It is part of telophase

It is part of metaphase

46.

1 point

in terms of the amount of ATP produced, damage to what part of the respiration cycle would be most dangerous to your health?

Electron transport chain

Pyruvate oxidation

Krebs cycle

Calvin cycle

Glycolysis

47.

1 point

Which of the following scenarios could not happen because it violates the 1st law of thermodynamics?

Pure energy is converted into an electron

An electron is completely destroyed without being converted to energy

energy is put into a system to make the system more ordered

an electron is converted into pure energy

The amount of energy present in a chemical reaction increases.

48.

1 point

Why do we have to exhale?

Cellular respiration produces carbon dioxide, which is poisonous, so we have to breathe it out

The hydrogen built up during the electron transport chain is dangerous in high concentrations, so we have to get rid of some of it.

Our body doesn't need all the oxygen we take in, so we breathe some of it back out.

We don't have to get rid of anything. It just allows the lungs to reset so they're ready to take in more oxygen.

We have to breathe out water vapor so the large quantity of water produced during respiration won't drown us.

49.

1 point

A molecule of DNA has 100 nitrogenous bases. How many phosphates does it have?

25

100

400

300

We don't have enough information to answer the question.

50.

1 point

How many chromatids are present in a human cell during metaphase of mitosis?

23

46

44

92

0