Chapter 2 Molecules Of Life - Water, Minerals And Carbohydrates
(162).webp "Chapter 2 Molecules Of Life - Water, Minerals And Carbohydrates - Quiz")
- 1.
Which of the followings is inorganic?
- A.
Monosaccharides
- B.
Carbon monoxide
- C.
DNA
- D.
Amino acids
Correct Answer
B. Carbon monoxideExplanation
Monosaccharides (carbohydrates), DNA (nucleic acids) and amino acids contain carbon atoms and are complex.
Although carbon monoxide contains carbon atom, it is too simple and should be regarded as inorganic.Rate this question:
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- 2.
Which of the followings is needed in plants for forming chlorophyll?
- A.
Magnesium
- B.
Iron
- C.
Calcium
- D.
Nitrate
Correct Answer
A. MagnesiumExplanation
Magnesium --> for chlorophyll;
Iron --> for haemoglobin in red blood cells;
Calcium --> for bones and teeth
Nitrate --> for forming proteins and nucleic acidsRate this question:
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- 3.
Which of the following is a disaccharide molecule?
- A.
Glucose
- B.
Galactose
- C.
Glycogen
- D.
Sucrose
Correct Answer
D. SucroseExplanation
Glucose, galactose --> monosaccharide;
Glycogen --> polysaccharideRate this question:
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- 4.
Glucose + glucose ----> ???
- A.
Maltose
- B.
Lactose
- C.
Sucrose
- D.
Table sugar
Correct Answer
A. MaltoseExplanation
Maltose = glucose + glucose;
Lactose = glucose + galactose;
Sucrose = table sugar = glucose + fructoseRate this question:
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- 5.
Which of the followings is the storage form of carbohydrates in animals?
- A.
Glucose
- B.
Glycerol
- C.
Glycogen
- D.
Starch
Correct Answer
C. GlycogenExplanation
Glycerol 甘油 + 3 fatty acids --> fats;
Starch: the storage form of carbohydrates in plants, not animals;
Glucose is NOT stored (it will be turned into glycogen for storage in animals)Rate this question:
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- 6.
Which of the followings is a function of cholesterol?
- A.
Increasing the risk of heart attack
- B.
Making enzymes
- C.
Making steroid hormones
- D.
As a solvent
Correct Answer
C. Making steroid hormonesExplanation
heart attack is not a function;
making enzymes is a function of proteins;
as a solvent is a function of waterRate this question:
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- 7.
Which of the followings is NOT a component of phospholipids?
- A.
Glycerol
- B.
Base
- C.
Fatty acids
- D.
Phosphate group
Correct Answer
B. BaseExplanation
Phospholipids = glycerol + fatty acids + phosphate groupRate this question:
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- 8.
Which of the followings is water-soluble?
- A.
Maltose
- B.
Glycogen
- C.
Starch
- D.
Cellulose
Correct Answer
A. MaltoseExplanation
maltose is disaccharide --> water soluble;
glycogen, starch and cellulose are polysaccharides --> insoluble in waterRate this question:
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- 9.
Where are fats stored in mammals' body?
- A.
Oil tissues
- B.
Adipose tissues
- C.
Muscles
- D.
Skin
Correct Answer
B. Adipose tissuesExplanation
Fats are stored in adipose tissues in mammals' bodies. Adipose tissues are specialized connective tissues that store excess energy in the form of fat. These tissues are found throughout the body, particularly in areas such as the abdomen, thighs, and buttocks. When the body requires energy, it can break down the stored fats in adipose tissues to provide fuel. This storage mechanism helps mammals regulate their energy balance and maintain insulation and protection for vital organs.Rate this question:
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- 10.
Which of the followings is used to release energy during cellular respiration in all organisms?
- A.
Oxygen
- B.
Amino acids
- C.
Glycogen
- D.
Glucose
Correct Answer
D. GlucoseExplanation
Anaerobic respiration does not involve oxygen.Rate this question:
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Current Version
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Aug 12, 2024Quiz Edited by
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Sep 15, 2014Quiz Created by
Chungchung
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