NBS Chemistry Enzymes and Hormones Flashcards Preview

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Flashcards in NBS Chemistry Enzymes and Hormones Deck (32):
1

Most enzymes are:
A. Cholesterol
B. Proteins
C. Carbohydrates
D. Fatty acids

Proteins

2

Which of the following is the rate limiting step for the krebs cycle?
A. Carnitine Acyltransferase 1
B. Acetyl CoA carboxylase
C. Isocitrate Dehydrogenase
D. Glucose 6- phosphate dehydrogenase

C
Isocitrate CoA carboxylase

3

Which of the following is the rate limiting step for the Fatty acid synthesis?
A. Carnitine Acyltransferase 1
B. Acetyl CoA carboxylase
C. Isocitrate Dehydrogenase
D. Glucose 6- phosphate dehydrogenase

B
Acetyl CoA Carboxylase

4

Which of the following is the rate limiting step for the Beta oxidation?
A. Carnitine Acyltransferase 1
B. Acetyl CoA carboxylase
C. Isocitrate Dehydrogenase
D. Glucose 6- phosphate dehydrogenase

A
Carnitine Acyltransferase 1

5

Which of the following is the rate limiting step for the Urea cycle?
A. Carnitine Acyltransferase 1
B. Carbamoyl phosphate synthetase 1
C. Isocitrate Dehydrogenase
D. Glucose 6- phosphate dehydrogenase

B
Carbomoyl Phosphate synthetase 1

6

Which of the following is the rate limiting step for the HMP Shunt?
A. Carnitine Acyltransferase 1
B. Acetyl CoA carboxylase
C. Isocitrate Dehydrogenase
D. Glucose 6- phosphate dehydrogenase

D
Glucose 6- phosphate dehydrogenase

7

How many actions can an enzyme influence at once?
A. unlimited
B. 3
C. 1
D. 2

1
only one at a time

8

T/F: Anabolic reactions require energy

True

9

T/F: Catabolic reactions build up molecules

False

Catabolic break things down

10

Would the result of a catabolic reaction generate or lose energy?

generate

11

An enzyme + Cofactor=
A. Polyenzyme
B. Haloenzyme
C. Apoenzyme

Haloenzyme

12

An enzyme without a cofactor is called a _________?

Apoenzyme

13

During enzyme regulation, steroids help to regulate the rate of enzymatic degradation or synthesis?

Synthesis

14

A zygomen is a protein that becomes an active enzyme when parts are _______?
A. Added
B. Removed

Removed

15

Do substrates usually inhibit or stimulate a reaction?

Stimulate

16

Do Products usually inhibit a reaction or stimulate a reaction?

Inhibit

17

An area on the enzyme where a compound may bind and change the rate of activity is called a _________ site?

allosteric site

18

Michaelis-Menten constant (Km) is the concentration of substrate at which an enzyme yields:
A. 1/1 Vmax
B. 1/2 Vmax
C. 2/3 Vmax
D. 1/4 Vmax

1/2 Vmax

19

Kinase transfers a ________ usually from an _____?

Phosphate, ATP

20

Oxidoreductase moves _________?

hydrogen

21

NAD breaks molecules and NADH ______ molecules?

Builds

22

What amino acid formed epinephrine?

Tyrosine

23

Insulin comes from the __________of ___________ and is made by beta cells.

Islets of Langerhans

24

This peptide hormone is secreted from the tail of the pancreas?

Insulin

25

This peptide hormone is secreted from alpha cells within the pancreas?

glucagon

26

Insulin inhibits which of the following:
A. Aldosterone
B. Hormone sensitiev lipase
C. Kinase

hormone sensitive lipase

27

What is the derivative of steroids?
A. Fatty acids
B. Peptides
C. Cholesterol
D. Carbohydrates

Cholesterol

28

Aldosterone is an example of:
A. Gonadocorticoids
B. Mineralcorticoids
C. Glucocorticoids

Mineralcorticoids

ALDOSTERONE IS SALTY about it

29

Cortisol is an example of:
A. Gonadocorticoids
B. Mineralcorticoids
C. Glucocorticoids

Glucocorticoids

Cortisol is a Sweetie pie

30

Estrogen and testosterone are an examples of:
A. Gonadocorticoids
B. Mineralcorticoids
C. Glucocorticoids

Gonadocorticoids

SEX

31

What is the initial substrate for testosterone synthesis?
A. Long chain Fatty Acids
B. Free Cholesterol
C. Proteins
D. Hormone sensitive lipase

Free Cholesterol

32

Which of the following would increase gluconeogenesis:
A. Gonadocorticoids
B. Mineralcorticoids
C. Glucocorticoids

Glucocorticoids