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Bioprocess Engineering Mcqs

Q:

Which of the following is a metal salt of citric acid used to prevent blood clot?

A) Trimagnesium citrate B) Trisodium citrate
C) Dimagnesium citrate D) Bisodium citrate
 
Answer & Explanation Answer: B) Trisodium citrate

Explanation: Metal salts of citric acid such as trisodium citrate are used to prevent blood clotting by complexing calcium. Trisodium citrate can be used in detergents and cleaners as a cleaning agent instead of phosphates.

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Q:

Citric acid is a weak organic acid.

A) True B) False
 
Answer & Explanation Answer: A) True

Explanation: Citric Acid is a naturally occurring preservative used in many applications including canning, flavoring, cleaning, and even photography development. As a weak organic acid, it is commonly purchased in powder form, but is found in all citrus fruits including lemons, limes, oranges, and tangerines.

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42
Q:

How much ATP is produced in the citric acid cycle?

A) 32 B) 34
C) 36 D) 38
 
Answer & Explanation Answer: D) 38

Explanation: A total of 10 NADH’s is made (in glucolysis and the Krebs cycle) per glucose, and 2 FADH?‘s. We generally say that you get 3 ATPs per NADH and 2 per FADH?, so that these carriers produce a total of 30+4 = 34 ATPs and the Krebs cycle itself produces 2 GTPs, which are equivalent to 2 more ATPs, for a total of 38.

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39
Q:

How much NADH is produced in the citric acid cycle?

A) One B) Three
C) Six D) Two
 
Answer & Explanation Answer: C) Six

Explanation: Products of the first turn of the cycle are one GTP (or ATP), three NADH, one QH?, and two CO?. Because two acetyl-CoA molecules are produced from each glucose molecule, two cycles are required per glucose molecule. Therefore, at the end of two cycles, the products are: two GTP, six NADH, two QH?, and four CO?.

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30
Q:

Yeast is only restricted to aerobic fermentation.

A) True B) False
 
Answer & Explanation Answer: B) False

Explanation: Yeast can use any of three major metabolic modes: aerobic fermentation in the presence of sugar and oxygen, anaerobic fermentation in the presence of sugar but absence of oxygen, and respiration (necessarily aerobic) in the presence of oxygen and a low concentration of fermentable sugar.

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40
Q:

Glycolysis is an aerobic process.

A) True B) False
 
Answer & Explanation Answer: B) False

Explanation: It is an anaerobic process. None of its nine steps involve the use of oxygen. However, immediately upon finishing glycolysis, the cell must continue respiration in either an aerobic or anaerobic direction; this choice is made based on the circumstances of the particular cell.

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48
Q:

Lignincellulose is a part of woody material.

A) True B) False
 
Answer & Explanation Answer: A) True

Explanation: The woody material that gives plants their rigidity and structure comprises three main types of carbon-based polymer — cellulose, hemicellulose and lignin — collectively called lignocellulosic biomass. When taken apart, these polymers yield chemical components that can be used to make biofuels. It is a complex of lignin and cellulose present in the cell walls of woody plants.

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27
Q:

Saccharolysis is _________

A) Conversion of starch into sugar B) Conversion of sugar into starch
C) Hydrolysis of sugar D) Breakdown of sugar
 
Answer & Explanation Answer: C) Hydrolysis of sugar

Explanation: Saccharolytic is capable of hydrolyzing or otherwise metabolizing a sugar molecule resulting in the production of energy.

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