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WorksheetsChapter 4 Chemical Composition of the Cell
Total questions: 15
Worksheet time: 15mins
As shown in the photo, what property of this molecule has?
Polar
Non-polar
Hydrophobic
Dissolve in oil
Water is vital for survival of organisms. Which of the following is not the importance of water?
Universal solvent
Medium of transport
Medium for biochemical reactions to take place
Maintenance of health
Which pair of type of carbohydrate and its function is wrongly arranged?
Cellulose – structural polysaccharide in plant cell wall
Chitin – an important component in the exoskeleton of the insects
Glycogen – an energy storage in animals
Galactose – give sweet taste to the germinating corns
Carbohydrate X is a type of simple sugar. It has sweet taste. It can reduce copper (II) ions in Benedict’s solution into copper (I) ions. It is a kind of monomer. What is X?
Maltose
Lactose
Galactose
Cellulose
Which of the following sugar gives negative result when reacting with Benedict’s solution?
Glucose
Lactose
Sucrose
Galactose
The equation below shows the breakdown process of disaccharides.
Maltose + Water → Glucose + Glucose
This reaction is called?
Dialysis
Condensation
Hydrolysis
Assimilation
Diagram here illustrates the structure level of a protein molecule. Which of the following statement is true about this structure?
I It is tertiary structure of a protein molecule
II It is precise, compact and unique
III It possesses a functioning three dimensional shape
IV One of the examples of this protein is keratin
I, II, III
I, II, IV
I, III, IV
II, III, IV
Which of the following answers is not the function of protein molecule within human body?
Heat insulator
Antibody maker
Energy source
Enzymes
The conformation of a protein molecule can be destroyed by heat. It is called protein ________________.
condensation
damage
termination
denaturation
Diagram above shows general structure of a type of molecule. Which of the following statement is false?
I This molecule is known as amino acid
II It is a kind of monomer that is used to build protein structure including enzymes
III There are two functional groups, which are amino group and carboxyl group, attached to α-carbon
IV R group of the amino acid, which is also called side chain, has nothing to do with the chemical properties of an amino acid
I
I, II
III, IV
IV
Which of the following statements about lipids are correct?
I They contain element carbon, hydrogen, oxygen and sometimes phosphorus and nitrogen
II Most lipids are insoluble in water, but soluble in organic solvents
III Lipids which are liquid at room temperature are fats
IV All kinds of lipids are bad for human health
I
I, II
I, II, III
I, II, III, IV
Which food contains the highest lipid content?
This food supplement contains special nutrient that helps to speed up metabolism of fats. Such nutrient belongs to:
Steroid
Phospholipid
Wax
First class protein
This disease is caused by over intake of which nutrient?
Amino acids
Glucose
Cholesterol
Steroid
Siti has health problem where her blood triglycerides and cholesterol levels are high. If you are her doctor, you should advise her to take in which type of food?
