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What element is present in proteins but not in carbohydrates?
A. Nitrogen
B. Oxygen
C. Hydrogen
Nitrogen - it is present in proteins but not in carbohydrates. Carbohydrates and proteins both contain carbon, hydrogen and oxygen.
Which is the most abundant biomolecule on earth?
A. Mineral salts
B. Proteins
C. Lipids
D. Carbohydrates
D. Carbohydrates
Which of the following is not readily soluble in water?
1. Monosaccharides
2. Polysaccharides
3. Disaccharides
2. Polysaccharides are not readily soluble in water.
What does DNA stand for?
1. Deoxyribose nucleic acid
2. Delta ribonucleic acid
3. None of the above
1. The full form of DNA is deoxyribose nucleic acid
What is the fastest reacting enzyme?
1. Cholesterol
2. Steroid
3. Carbonic anhydrase
3. Carbonic anhydrase - it is found in red blood cells, gastric mucosa and pancreatic cells
What elements are present in fats and oils?
A. Carbon and Hydrogen
B. Carbon and oxygen
C. Carbon, Hydrogen and Oxygen
C. Carbon, Hydrogen and Oxygen
What is the difference between fats and oils?
1. Fats are solids and oils are liquids.
2. Oils are unrelated chemicals and fats are lipids.
3. None of the above.
1. Fats are solid lipids and oils are liquid lipids.
Which of the following is not a part of lipids?
1. Ribose
2. Waxes
3. Hormones
4. Vitamin D
1. Ribose is not a part of lipids, it is a part of nucleic acids.
What percentage of water do most cells contain?
1. 50%
2. 75%
3. 84%
2. Most cells contain 75% water in them.
Select one nucleic acid:
1. Adenosine
2. Leucine
3. Cholesterol
1. Adenosine - it blocks electrical signals in the heart that cause irregular heart rhythms.
What is glycogen made from?
A. Glycerol
B. Glucose
C. Glucagon
B. Glucose
What are biomolecules?
A. Biomolecules are the essential organic molecules involved in metabolic processes of living organisms.
B. Biomolecules are molecules which are alive.
C. None of the above.
A. Biomolecules are organic molecules involved in the maintenance and metabolic processes of living organisms.
Which biomolecule is the most versatile?
1. Lipids
2. Proteins
3. Carbohydrates
2. Proteins carry our most molecular functions and support structures.
What happens to the activity of an enzyme as the temperature is increased?
1. It increases
2. It decreases
3. It increases till a maximum point and then decreases
3. The activity of an enzyme increases as the temperature increases, then it decreases above an optimum temperature.
How many amino acids are required to make protein?
1. 15
2. 20
3. 100
2. It takes 20 amino acids to create protein.
Which biomolecule is distributed more widely in a cell?
A. RNA
B. DNA
C. Spaherosomes
A. RNA
Which of the following is an example of a Monosaccharide?
1. Maltose
2. Starch
3. Glucose
3. Glucose
What is a nucleic acid?
1. Nucleic acid causes nuclear reactions in the sun.
2. A nuclear acid is a chain of nucleotides.
2. A nucleic acid is a macromolecule made up of chains of nucleotides. For example, DNA and RNA.
Select a sugar molecule:
1. Lactose
2. RNA
3. Monosaccharide
1. Lactose
Which nutrient provides the most energy upon breakdown?
1. Fats
2. Carbohydrates
3. Proteins
What are enzymes?
A. Proteins that serve as biological catalysts.
B. Living organisms that act as biological catalysts.
C. Complex carbohydrates that act as biological catalysts.
A. Enzymes are proteins that act as biological catalysts. Living organisms produce enzymes but the enzymes themselves are not alive.
What are polysaccharides?
A. Single carbon ring
B. Double carbon ring
C. Many glucose molecules bound together
C. Polysaccharides are many glucose molecules joined together, for example sucrose and lactose.
How many carbon sugar molecules are there in a nucleotide?
1. 5
2. 4
3. 7
1. A nucleotide is a 5 carbon sugar molecule joined to a phosphate group.
Select an amino acid:
1. Leucine
2. Adenosine
3. Glycogen
1. Leucine - can be used by skeletal muscle to give energy during exercise.
In what year was the cell discovered?
1. 1700
2. 1665
3. 1675
2. 1665 - It was discovered by Robert Hooke