Question 1 Which of the following provides hydrogen for the reduction of pyruvate to lactic acid? Select one: A.NADH B.U

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Question 1
Which of the following provides hydrogen for the reduction of pyruvate to lactic acid?
Select one:
A.NADH
B.Urea
C.H2O
D.Acetyl CoA
E.NH3
Question 2
Which of the following statements about emulsification of fat by bile is incorrect?
Select one:
A.The active component in bile for emulsification is bile salts.
B.Bile is released from the gallbladder.
C.The fat-loving part of bile salts interacts with lipid molecules.
D.Bile salts are synthesized from cholesterol.
E.The emulsified fat droplets are attracted to each other.
Question 3
In oxidative phosphorylation, each NADH can yield 3 ATPs whereas each FADH2 can yield only 2 ATPs because
Select one:
A.FADH2 is only produced in the citric acid cycle.
B.FAD can carry two hydrogen atoms.
C.FADH2 enters the electron transport system at a later stage.
D.The cellular concentration of FADH2 is lower than that of NADH.
E.FADH2 is far away from ATP synthase.
Question 4
To alleviate painful arthritis caused by uric acid crystals, which of the following method(s) is/are useful?
I. Avoid drinking beer
II. Avoid food rich in purine
III. Treatment of anti-inflammatory drugs
Select one:
A.II and III only
B.II only
C.I only
D.I and II only
E.I, II and III
Question 5
Which of the following enzymes is used in both glycogenolysis and glycogenesis?
Select one:
A.
Glycogen synthase
B.Phosphoglucomutase
C.Glycogen phosphorylase
D.Hexokinase
E.Glucose 6-phosphatase
Question 6
Which of the following assumptions about the Michaelis-Menten equation is correct when the substrate concentration is high?
Select one:
A.Km + [Substrate] ≈ Km
B.Km + [Substrate] ≈ 0
C.Km + [Substrate] ≈ [Substrate]
D.Km ≈ [Substrate]
E.Km + [Substrate] ≈ 10000
Question 7
Which of the following enzyme(s) is/are found elevated in the blood of patients with liver diseases?
I. Alanine aminotransferase
II. Aspartate aminotransferase
III. Lactate dehydrogenas
Select one:
A.II only
B.I and II only
C.I only
D.I, II and III
E.II and III only
Question 8
Which of the following molecules is/are involved in both aerobic and anaerobic respiration?
I. Acetyl CoA
II. Pyruvate
III. Lactate
Select one:
A.I only
B.II only
C.I and II only
D.II and III only
E.I, II and III
Question 9
Only a small amount of enzymes are needed to catalyze various biochemical reactions because enzymes
Select one:
A.are small proteins.
B.can be activated by enzyme cofactors.
C.are easily denatured at high temperatures.
D.can speed up both forward and reverse reactions.
E.are not altered by the reactions.
Question 10
The reaction rate of salivary amylase with starch decreases as the concentration of chloride ions is reduced. What is the role of chloride ions in the action of salivary amylase?
Select one:
A.Coenzymes
B.Non-competitive inhibitors
C.Cofactors
D.Irreversible inhibitors
E.Competitive inhibitors
Question 11
Which of the following molecules contains amino acids?
Select one:
A.Glycogen
B.Testosterone
C.Cellulose
D.Maltose
E.Chylomicron
Question 12
Which of the following is the final electron acceptor in the electron transport chain of cellular respiration?
Select one:
A.Water
B.Oxygen
C.Coenzyme Q
D.FADH2
E.NADH
Question 13
Which of the following is the major site for the formation of urea?
Select one:
A.Gallbladder
B.Liver
C.Kidney
D.Skeletal muscle
E.Small intestine
Question 14
High density lipoproteins are known as good cholesterol because
Select one:
A.they breakdown triglycerides into fatty acids and glycerol.
B.they contain enzymes for the degradation of cholesterol.
C.they take cholesterol back to the liver where it is broken down.
D.they are soluble in the blood.
E.they are lipoproteins that contain the smallest amount of cholesterol.
Question 15
Which of the following processes is/are carried out in the mitochondrial matrix?
I. Citric acid cycle
II. Beta-oxidation
III. Oxidative phosphorylation
Select one:
A.I and II only
B.II and III only
C.II only
D.I only
E.I, II and III