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B2 > NBS Chemistry Enzymes and Hormones > Flashcards

NBS Chemistry Enzymes and Hormones Flashcards

1
Q 
Most enzymes are:
A. Cholesterol
B. Proteins
C. Carbohydrates
D. Fatty acids
A

Proteins

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2
Q 
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
A

C

Isocitrate CoA carboxylase

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3
Q 
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
A

B

Acetyl CoA Carboxylase

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4
Q 
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

A

Carnitine Acyltransferase 1

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5
Q 
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
A

B

Carbomoyl Phosphate synthetase 1

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6
Q 
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
A

D

Glucose 6- phosphate dehydrogenase

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7
Q 
How many actions can an enzyme influence at once?
A. unlimited
B. 3
C. 1
D. 2
A

1

only one at a time

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8
Q

T/F: Anabolic reactions require energy

A

True

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9
Q

T/F: Catabolic reactions build up molecules

A

False

Catabolic break things down

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10
Q

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

A

generate

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11
Q

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

A

Haloenzyme

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12
Q

An enzyme without a cofactor is called a _________?

A

Apoenzyme

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13
Q

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

A

Synthesis

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14
Q

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

A

Removed

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15
Q

Do substrates usually inhibit or stimulate a reaction?

A

Stimulate

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16
Q

Do Products usually inhibit a reaction or stimulate a reaction?

A

Inhibit

17
Q

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

A

allosteric site

18
Q 
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
A

1/2 Vmax

19
Q

Kinase transfers a ________ usually from an _____?

A

Phosphate, ATP

20
Q

Oxidoreductase moves _________?

A

hydrogen

21
Q

NAD breaks molecules and NADH ______ molecules?

A

Builds

22
Q

What amino acid formed epinephrine?

A

Tyrosine

23
Q

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

A

Islets of Langerhans

24
Q

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

A

Insulin

25
Q

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

A

glucagon

26
Q

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

A

hormone sensitive lipase

27
Q 
What is the derivative of steroids?
A. Fatty acids
B. Peptides
C. Cholesterol
D. Carbohydrates
A

Cholesterol

28
Q

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

A

Mineralcorticoids

ALDOSTERONE IS SALTY about it

29
Q

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

A

Glucocorticoids

Cortisol is a Sweetie pie

30
Q

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

A

Gonadocorticoids

SEX

31
Q 
What is the initial substrate for testosterone synthesis?
A. Long chain Fatty Acids
B. Free Cholesterol
C. Proteins
D. Hormone sensitive lipase
A

Free Cholesterol

32
Q

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

A

Glucocorticoids

B2 (31 decks)

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