WorksheetsUnit 6 Biomolecules Quiz
Total questions: 50
Worksheet time: 25mins
What is the primary focus of biochemistry?
Study of physical properties of cells
Study of chemical compounds and processes in living organisms
Study of genetic mutations
Study of ecological systems
Which of the following is NOT a concern of molecular biology?
DNA replication
Photosynthesis
Transcription and translation
Interaction of biomolecules within cells
What is the relationship between biochemistry and molecular biology?
They are completely unrelated fields.
Molecular biology is a specialized branch of biochemistry.
Biochemistry is a specialized branch of molecular biology.
They focus on the same chemical processes.
Which of the following is a key focus of molecular biology?
Study of ecosystems
Study of DNA replication and protein synthesis
Study of animal behavior
Study of plant physiology
What is the main goal of biochemistry in relation to living organisms?
To study the physical structure of cells
To solve problems faced by living organisms using chemical knowledge
To classify organisms based on their genetic makeup
To study the evolution of species
Which of the following biomolecules is primarily responsible for storing genetic information?
Proteins
Lipids
DNA
Carbohydrates
Which biomolecule is involved in the transport of oxygen in the blood?
Hemoglobin (a protein)
Glucose (a carbohydrate)
Cholesterol (a lipid)
RNA
Which of the following is NOT a function of lipids?
Energy storage
Structural component of cell membranes
Catalyzing biochemical reactions
Insulation against heat and cold
Which biomolecule is the primary source of quick energy for cells?
Proteins
Lipids
Carbohydrates
DNA
Which of the following biomolecules is single-stranded and involved in protein synthesis?
DNA
RNA
Lipids
Carbohydrates
What is the primary structure of a protein?
The 3D folding of the polypeptide chain
The linear sequence of amino acids
The association of multiple polypeptide chains
The formation of alpha helices and beta sheets
Which of the following bonds is responsible for linking amino acids in a protein?
Hydrogen bonds
Peptide bonds
Ionic bonds
Disulfide bonds
What is the function of enzymes in living organisms?
Energy storage
Structural support
Catalyzing biochemical reactions
Transporting oxygen
Which of the following is an example of a structural protein?
Hemoglobin
Collagen
Insulin
Antibodies
What is the role of antibodies in the body?
Transporting oxygen
Providing structural support
Catalyzing biochemical reactions
Providing immunity against pathogens
Which of the following is a characteristic of saturated fatty acids?
They have double bonds between carbon atoms.
They are liquid at room temperature.
They have all single bonds between carbon atoms.
They are found in plant oils.
What is the primary function of phospholipids in cells?
Energy storage
Structural component of cell membranes
Catalyzing biochemical reactions
Transporting oxygen
Which of the following is an example of a steroid?
Cholesterol
Triglycerides
Phospholipids
Waxes
What is the energy content of lipids compared to carbohydrates?
Lipids provide less energy per gram than carbohydrates.
Lipids provide the same amount of energy per gram as carbohydrates.
Lipids provide more energy per gram than carbohydrates.
Lipids do not provide energy.
Which of the following is a source of unsaturated fats?
Butter
Olive oil
Cheese
Ghee
Which of the following is a monosaccharide?
Sucrose
Lactose
Glucose
Starch
What is the primary function of carbohydrates in living organisms?
Energy storage
Structural support
Catalyzing biochemical reactions
Transporting oxygen
Which of the following is a polysaccharide?
Glucose
Sucrose
Starch
Lactose
What is the main structural carbohydrate in plant cell walls?
(a)
Which of the following is a polysaccharide?
Glucose
Sucrose
Starch
Lactose
What is the main structural carbohydrate in plant cell walls?
Starch
Glycogen
Cellulose
Chitin
Which of the following is a source of carbohydrates?
Meat
Fish
Rice
Cheese
Which of the following is a disaccharide?
Glucose
Fructose
Sucrose
Starch
What is the molecular formula of a disaccharide?
C6H12O6
C12H22O11
C6H10O5
C12H24O12
Which of the following is a monosaccharide found in RNA?
Glucose
Ribose
Fructose
Galactose
Which of the following is a polysaccharide used for energy storage in animals?
Starch
Glycogen
Cellulose
Chitin
Which of the following is a polysaccharide found in the cell walls of fungi?
Starch
Glycogen
Cellulose
Chitin
What is the shape of the DNA molecule?
Single-stranded helix
Double-stranded helix
Triple-stranded helix
Linear chain
Which of the following nitrogen bases is found in DNA but not in RNA?
Adenine
Cytosine
Thymine
Uracil
What type of bond holds the two strands of DNA together?
Peptide bonds
Hydrogen bonds
Ionic bonds
Disulfide bonds
Which of the following is a component of a nucleotide in DNA?
Ribose sugar
Uracil
Deoxyribose sugar
Phosphate group
What is the role of the phosphate group in DNA?
It forms hydrogen bonds with nitrogen bases.
It links the sugar molecules in the DNA backbone.
It determines the genetic code.
It stabilizes the double helix structure.
What is the primary function of DNA?
Energy storage
Catalyzing biochemical reactions
Storing and transmitting genetic information
Providing structural support
Which of the following is responsible for the inheritance of traits from parents to offspring?
Proteins
Lipids
DNA
Carbohydrates
What is the role of genes in DNA?
They provide energy for cellular processes.
They store and control hereditary information.
They catalyze biochemical reactions.
They provide structural support to cells.
Which of the following processes ensures the transfer of genetic information from one generation to the next?
Photosynthesis
DNA replication
Protein synthesis
Cellular respiration
What is the relationship between DNA and chromosomes?
DNA is a component of chromosomes.
Chromosomes are made up of proteins only.
DNA and chromosomes are unrelated.
Chromosomes are found outside the nucleus.
What is the primary difference between RNA and DNA?
RNA is double-stranded, while DNA is single-stranded.
RNA contains thymine, while DNA contains uracil.
RNA is single-stranded, while DNA is double-stranded.
RNA contains deoxyribose sugar, while DNA contains ribose sugar.
Which of the following nitrogen bases is found in RNA but not in DNA?
Adenine
Cytosine
Thymine
Uracil
What is the role of mRNA in protein synthesis?
It carries genetic information from DNA to the ribosome.
It transfers amino acids to the ribosome.
It forms the structure of the ribosome.
It catalyzes the formation of peptide bonds.
Which of the following types of RNA is involved in transferring amino acids during protein synthesis?
mRNA
tRNA
rRNA
DNA
What is the role of rRNA in protein synthesis?
It carries genetic information from DNA to the ribosome.
It transfers amino acids to the ribosome.
It forms the structure of the ribosome.
It catalyzes the formation of peptide bonds.
What is the process by which DNA is copied into RNA called?
Translation
Transcription
Replication
Mutation
What is the process by which RNA is used to synthesize proteins called?
Translation
Transcription
Replication
Mutation
Which of the following is the correct sequence of the central dogma of molecular biology?
DNA → RNA → Protein
RNA → DNA → Protein
Protei
