The six most common elements present in living organisms are:
Carbon, hydrogen , oxygen, sulphur, phosphorus, chlorine
Carbon, hydrogen, oxygen, nitrogen, phosphorus, sulphur
Carbon, hydrogen, oxygen, nitrogen, phosphorus, sodium
Carbon, hydrogen, oxygen, nitrogen, boron, phosphorus
Metabolism is:
The way in which living organisms obtain and use food
The getting rid of waste products of metabolism from the body
The way in which living organisms react to their environment
The sum of all the chemical reactions in a living organism
The five elements present as dissolved salts in living organisms are:
Sodium, potassium, carbon, chlorine, calcium
Sodium, potassium, chlorine, maganese, calcium
Sodium, potassium, chlorine, magnesium, calcium
Sodium, potassium, oxygen, chlorine, calcium
Trace elements are present in living organisms:
to prevent disease
to maintain health
in large amounts
in small amounts
Which of the following is NOT a monosaccharide?
Maltose
Glucose
Fructose
Galactose
Which of the following is NOT a disaccharide?
Sucrose
Lactose
Which of the following is NOT a polysaccharide?
Starch
Cellulose
Glycogen
Which of the following is NOT a reducing sugar?
Which of the following reagents are used to test for reducing sugars?
Biuret's reagent
Benedict's reagent
Iodine
Methylene blue
Which of the following is another name for starch?
Amylase
Maltase
Amylose
Polysaccharides are composed of long chains of repeating:
Monosaccharides
Amino acids
Lipids
Nucleic acids
In the presence of starch, iodine turns:
Brick-red
Orange
Blue-black
Blue
Which of the following foods is a good source of starch?
Fish
Eggs
Potato
Chocolate
Phospholipids are a major component of:
DNA
Cell membranes
Cytosol
Cell walls
Peptide bonds are found between:
Glycerol and fatty acids
Vitamins
Which of the following elements is always present in protein?
Phosphorus
Sulphur
Nitrogen
Calcium
How many common amino acids are there?
2
20
200
2000
Which of the following vitamins is water soluble?
A
C
D
K
Which of the following elements is required for the formation of the middle lamella in plants?
Potassium
Sodium
Magnesium
Which of the following elements is required for the formation of chlorophyll in plants?
What is the symptoms associated with a deficiency in Vitamin C?
Night-blindness
Beri-beri
Scurvy
Rickets
What are the symptoms associated with a deficiency of Vitamin D?
Beri beri
What are the symptoms associated with a deficiency of Vitamin A?
What are the symptoms associated with a deficiency of Vitamin K?
Inability to blood clot
Anaemia
Fatigue
Anabolism is the:
Sum of all the chemical reactions in an organism
Building up large molecules from small molecules using energy
Breaking down large molecules into small molecules with the release of energy
Denaturation of molecules with the release of energy
Catabolism is the:
Building up of large molecules from small molecules using energy
Breaking down of large molecules into small molecules with the release of energy
Which of the following is NOT an anabolic reaction?
Photosynthesis
Protein synthesis
DNA replication
Respiration
Which of the following is NOT a catabolic reaction?
Digestion
Hydrolysis
Which of the following is the opposite of a hydrolysis reaction?
Photosynthesis reaction
Condensation reaction
Respiration reaction
Digestion reaction
Which of the following is NOT a function of water in the body?
Acts as a medium in which chemical reactions occur
Acts as a solvent
Acts as a source of energy
Acts as a good retainer of heat
