Questão 1
Questão
The six most common elements present in living organisms are:
Responda
-
Carbon, hydrogen , oxygen, sulphur, phosphorus, chlorine
-
Carbon, hydrogen, oxygen, nitrogen, phosphorus, sulphur
-
Carbon, hydrogen, oxygen, nitrogen, phosphorus, sodium
-
Carbon, hydrogen, oxygen, nitrogen, boron, phosphorus
Questão 2
Responda
-
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
Questão 3
Questão
The five elements present as dissolved salts in living organisms are:
Responda
-
Sodium, potassium, carbon, chlorine, calcium
-
Sodium, potassium, chlorine, maganese, calcium
-
Sodium, potassium, chlorine, magnesium, calcium
-
Sodium, potassium, oxygen, chlorine, calcium
Questão 4
Questão
Trace elements are present in living organisms:
Responda
-
to prevent disease
-
to maintain health
-
in large amounts
-
in small amounts
Questão 5
Questão
Which of the following is NOT a monosaccharide?
Responda
-
Maltose
-
Glucose
-
Fructose
-
Galactose
Questão 6
Questão
Which of the following is NOT a disaccharide?
Responda
-
Maltose
-
Fructose
-
Sucrose
-
Lactose
Questão 7
Questão
Which of the following is NOT a polysaccharide?
Responda
-
Starch
-
Cellulose
-
Glycogen
-
Maltose
Questão 8
Questão
Which of the following is NOT a reducing sugar?
Responda
-
Maltose
-
Fructose
-
Sucrose
-
Glucose
Questão 9
Questão
Which of the following reagents are used to test for reducing sugars?
Responda
-
Biuret's reagent
-
Benedict's reagent
-
Iodine
-
Methylene blue
Questão 10
Questão
Which of the following is another name for starch?
Responda
-
Amylase
-
Maltose
-
Maltase
-
Amylose
Questão 11
Questão
Polysaccharides are composed of long chains of repeating:
Responda
-
Monosaccharides
-
Amino acids
-
Lipids
-
Nucleic acids
Questão 12
Questão
In the presence of starch, iodine turns:
Responda
-
Brick-red
-
Orange
-
Blue-black
-
Blue
Questão 13
Questão
Which of the following foods is a good source of starch?
Responda
-
Fish
-
Eggs
-
Potato
-
Chocolate
Questão 14
Questão
Phospholipids are a major component of:
Responda
-
DNA
-
Cell membranes
-
Cytosol
-
Cell walls
Questão 15
Questão
Peptide bonds are found between:
Responda
-
Monosaccharides
-
Glycerol and fatty acids
-
Amino acids
-
Vitamins
Questão 16
Questão
Which of the following elements is always present in protein?
Responda
-
Phosphorus
-
Sulphur
-
Nitrogen
-
Calcium
Questão 17
Questão
How many common amino acids are there?
Questão 18
Questão
Which of the following vitamins is water soluble?
Questão 19
Questão
Which of the following elements is required for the formation of the middle lamella in plants?
Responda
-
Potassium
-
Sodium
-
Magnesium
-
Calcium
Questão 20
Questão
Which of the following elements is required for the formation of chlorophyll in plants?
Responda
-
Potassium
-
Sodium
-
Magnesium
-
Calcium
Questão 21
Questão
What is the symptoms associated with a deficiency in Vitamin C?
Responda
-
Night-blindness
-
Beri-beri
-
Scurvy
-
Rickets
Questão 22
Questão
What are the symptoms associated with a deficiency of Vitamin D?
Responda
-
Scurvy
-
Rickets
-
Beri beri
-
Night-blindness
Questão 23
Questão
What are the symptoms associated with a deficiency of Vitamin A?
Responda
-
Scurvy
-
Beri-beri
-
Night-blindness
-
Rickets
Questão 24
Questão
What are the symptoms associated with a deficiency of Vitamin K?
Responda
-
Night-blindness
-
Inability to blood clot
-
Anaemia
-
Fatigue
Questão 25
Questão
Anabolism is the:
Responda
-
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
Questão 26
Questão
Catabolism is the:
Responda
-
Sum of all the chemical reactions in an organism
-
Building up of large molecules from small molecules using energy
-
Breaking down of large molecules into small molecules with the release of energy
-
Denaturation of molecules with the release of energy
Questão 27
Questão
Which of the following is NOT an anabolic reaction?
Responda
-
Photosynthesis
-
Protein synthesis
-
DNA replication
-
Respiration
Questão 28
Questão
Which of the following is NOT a catabolic reaction?
Responda
-
Respiration
-
Digestion
-
Hydrolysis
-
Photosynthesis
Questão 29
Questão
Which of the following is the opposite of a hydrolysis reaction?
Responda
-
Photosynthesis reaction
-
Condensation reaction
-
Respiration reaction
-
Digestion reaction
Questão 30
Questão
Which of the following is NOT a function of water in the body?
Responda
-
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