Biology Grade 12 Review P2

Front 1

Amino acids can enter cellular respiration, but first they have to be

Back 1

deaminated

Front 2

Anaerobic respiration is less efficient than aerobic respiration for which of the following reasons?

Back 2

less ATP is produced in anaerobic respiration

Front 3

A particular organism releases carbon dioxide and alcohol as its end products. The organism is most likely which of the following?

Back 3

a yeast

Front 4

At the end of glycolysis, most of the energy originally found in glucose is located in molecules of

Back 4

Pyruvate

Front 5

During aerobic cellular respiration, which of the following molecules activates Krebs cycle?

Back 5

acetyl co-enzyme A

Front 6

What is the causes the inhibition of glycolysis?

Back 6

an increase in ATP signalling phosphofructokinase

Front 7

That is the theoretical yield of ATP resulting from aerobic respiration

Back 7

36 ATP

Front 8

Which of the following processes most likely does not involve anaerobic conditions?

Back 8

bacteria working in an aeration tank at a sewage plant

Front 9

Where in the electron transport chain does the energy come from for the synthesis of ATP?

Back 9

an electrochemical gradient across the inner mitochondrial membrane

Front 10

The major advantage of aerobic respiration to humans is that we

Back 10

obtain more usable energy by aerobic respiration

Front 11

Proteins are to ribosomes as ATP is to which of the following cell organelles?

Back 11

mitochondria

Front 12

Fatty acids can enter Krebs cycle as which of the following?

Back 12

They enter through acetyl-Coenzyme A

Front 13

Photon energy, captured by chlorophyll a, is transferred as chemical energy to

Back 13

a series of electron acceptors

Front 14

Photophosphorylation involves which of the following?

Back 14

chlorophyl, a proton gradient across the thylakoids, production of ATP and photons

Front 15

Photophosphorylation specifically refers to the

Back 15

synthesis of ATP using light

Front 16

Photosynthesis is important to the planet because it releases

Back 16

oxygen

Front 17

Ultimately, the light reactions

Back 17

form ATP and NADPH + H+

Front 18

Water is lost from plants by the process of

Back 18

transpiration

Front 19

When photosynthetic membranes are stacked in a chloroplast they are called which of the following?

Back 19

grana

Front 20

Which of the following most accurately describes the location of chloroplasts in the leaves of most plants?

Back 20

the palisade and spongy mesophyll tissues, and the guard cells of epidermal tissue

Front 21

Which of the following events of photosynthesis is concerned immediately with light?

Back 21

excitation of chlorophyll

Front 22

Which one of the following is not a characteristic of the light reactions?

Back 22

carbon fixation happens

Front 23

A deoxyribose sugar molecule includes

Back 23

5 carbon atoms

Front 24

An enzyme, which excises a mismatched base in a newly synthesized strand of DNA, is called

Back 24

an exonuclease

Front 25

Cytokinesis is

Back 25

the division of the cytoplasm and organelles of a cell between two daughter nuclei

Front 26

DNA is stable because hydrogen bonds are formed between

Back 26

purines and pyrimidines

Front 27

DNA replication

Back 27

results in each cell produced by mitosis and cytokinesis having a complete set of genetic instructions

Front 28

If a free phosphate is found at the 5' end of a DNA strand, what is found at the other end of the same strand?

Back 28

a hydroxyl group on the 3' carbon of a deoxyribose sugar

Front 29

In 1869, Miescher extracted nuclein from

Back 29

pus cells

Front 30

In DNA, phosphodiester bonds join

Back 30

phosphate groups and sugars

Front 31

The nucleotide at the end of one strand of a fragment of double-stranded DNA has a free phosphate attached to the 5' carbon of its deoxyribose sugar. The complementary nucleotide has

Back 31

a hydroxyl group (-OH) attached to the 3' carbon of its deoxyribose sugar

Front 32

The paired bases of a DNA molecule are best described as

Back 32

complementary

Front 33

When DNA helicase is active, the result is

Back 33

separation of the two strands of the double helix

Front 34

Which of the following statements concerning Griffith's work with Streptococcus pneumoniae is incorrect?

Back 34

injected R-form bacteria killed mice