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Flashcards in bio chap 7 Deck (55)
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1

the chemical bonds of carbohydrates and lipids have high potential energy because

their electrons are far away from the nuclei of the atoms

2

FALSE things about aerobic respiration

-aerobic respiration requires oxygen at every stage
-aerobic resp is carried out by all Prokaryote, Eukaryotes
-Aerobic resp is a 3-step process, with oxidative phoshporylation the last stage
-carbon dioxide is produced at every stage of aerobic respiration

3

The electron transport chain is part of

oxidative phosphorylation

4

The inputs to glycolysis DO NOT INCLUDE
Pi
Glucose
NAD+
ADP
NADH

NADH

5

oxidation is the gain of electrons

FALSE; reduction is the gain

6

After acetyl-CoA synthesi, the chemical energy of how many carbons of the original glucose molecule will be converted to chemical energy in the form of ATP in the remaining steps of aerobic respiration?

4

7

What statement is true regarding acetyl-CoA syntheis

acetyl-CoA synthesis forms the same number of NADH (per glucose molecule) as glucose

8

In a plant cell, all stages of cellular respiration are carried out in the cytoplasm TRUE/FALSE

FALSE, they occur in the mitochondrion

9

Acetyl-CoA synthesis is remarkably similiar to glycolysis in that when 1 molecule of pyruvate enters into the mitochondrion, two molecules of acetyl-CoA are formed

FALSE, i think only 1 molecule is formed

10

Phosphorylating glucose during phase 1 of glycolysis:

destabilizes the glucose molecule so that it can be broken down in step 2

11

How did the earliest organisms on Earth most likely produce ATP?

Glycolysis

12

The 1st phase of glycolysis requires the input of two ATP molecules. It is therefore:::

Endergonic

13

In the first three stages of cellular respiration, the chemical energy in glucose is transferred to:

ATP, and electron carriers

14

The second phase of glycolysis

cleaves a phophorylated sugar molecule and rearranges the products

15

During acetyl-CoA synthesis, pyruvate is broken down into CO2 and an acetyl group. The CO2 is:

less energetic than the acetyl group

16

In cellular respiration, oxygen:

gains electrons and is an oxidizing agent

17

What is true of the following statements is true regarding the Equation C6H12O6

The oxygen atoms in both CO2 and H20 are electronegative, and glucose could be considered a reducing agent

18

The majority of ATP produced during acetyl-CoA synthesis is the result of substrate level phosphorylation

FALSE:::substrate level ATP=4
Oxidative Phosphorylation ATP= 28

19

In what organelle is acetyl-CoA synthesis carried out in a cell

mitochondrion

20

During acetyl-CoA, pyruvate;

oxidized, loses electrons, probably to the electron chain

21

acetyl-CoA synthesis is an important step in cellular respiration because

it links glycolysis with aerobic respiration

22

Which of the following statements is true regarding a reducing agent

oxidation-reducing agent
reduction---oxidizing agent
(it loses electrons)

23

Imagine that a eukaryotic cell carries a mutation impairing its ability to phosphorylate glucose during glycolysis. What is a likely result of this mutation

glucose could move out of the cell, slowing cellular respiration

24

The pyruvate dehydrogenase complex plays a role in which of the following (a) formation of NADH
(b)oxidation of pyruvate
(c)formation of acetyl-CoA
(d)formation of CO2

All options are correct

25

In eukaryotes, acetyl-CoA synthesis takes place in the:

mitochondrial matrix

26

In cellular respiration, glucose is.... to CO2 and oxygen is....to water

oxidized, reduced

27

Imagine that you notice rust has formed on the frame of your bicycle . How would this have happened

The iron in your bicycle frame was oxidized and lost electrons

28

Like gylcolysis, acetyl-CoA synthesis produces both pyruvate and acetyl-CoA. These two products feed directly into the citric cycle and are the reactants for this process

FALSE

29

What is excess glucose stored as in animals

glycogen

30

How is excess glucose stored in plants

starch