Molecular Biology
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Molecules to Metabolism
SubtopicMolecules to Metabolism under Molecular Biology for Grade 11 IB.
Preview questions (no answers)
- 1.
Which of the following describes a metabolic pathway?
A.A single reaction that produces water
B.A series of linked chemical reactions
C.The movement of blood through the heart
D.The process of breathing
- 2.
What results when a protein is completely hydrolyzed?
A.Free fatty acids
B.Nucleotides
C.Amino acids
D.Monosaccharides
- 3.
In a condensation reaction joining two monosaccharides, which bond is formed?
A.Peptide bond
B.Phosphodiester bond
C.Glycosidic bond
D.Hydrogen bond
Download the worksheet for Molecular Biology - Molecules to Metabolism to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Water is a liquid at room temperature while methane is a gas. What is the primary reason for this?
A.Water has a lower molecular mass
B.Water molecules can form hydrogen bonds with each other
C.Methane is more reactive
D.Methane is polar
- 2.
Which feature of the water molecule makes it polar?
A.Equal sharing of electrons between Oxygen and Hydrogen
B.The presence of two hydrogen atoms
C.The unequal sharing of electrons leading to a dipole
D.The fact that it is a liquid
- 3.
Which statement about the boiling point of water is true?
A.It is 0°C
B.It is 100°C
C.It is lower than methane's boiling point
D.It is constant regardless of altitude
Download the worksheet for Molecular Biology - Water to practice offline. It includes additional chapter-level practice questions.
Carbohydrates and Lipids
SubtopicCarbohydrates and Lipids under Molecular Biology for Grade 11 IB.
Preview questions (no answers)
- 1.
Which of the following processes breaks down a triglyceride into its constituent parts?
A.Condensation
B.Hydrolysis
C.Dehydration
D.Polymerization
- 2.
Which sugar is used primarily as an energy source for cellular respiration?
A.Cellulose
B.Glucose
C.Ribose
D.Amylopectin
- 3.
Which of the following is most likely to be an oil at room temperature?
A.Saturated fat
B.Unsaturated fat
C.Trans fat
D.Glycogen
Download the worksheet for Molecular Biology - Carbohydrates and Lipids to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Which of the following is the best description of a protein's primary structure?
A.The way the protein folds into a ball
B.The sequence of amino acids in the chain
C.The bonding between different polypeptide chains
D.The spiral shape of the chain
- 2.
What is the relationship between genes and polypeptides?
A.One gene can code for one or more polypeptides
B.Polypeptides are used to build genes
C.Genes and polypeptides are the same molecule
D.Genes are produced by ribosomes
- 3.
A protein is denatured if its structure is permanently changed. Which of the following can cause this?
A.Optimal pH levels
B.Moderate temperature
C.Extreme pH levels
D.Presence of water
Download the worksheet for Molecular Biology - Proteins to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
What is the substrate in a reaction where amylase is the enzyme?
A.Proteins
B.Starch
C.Lipids
D.Amino acids
- 2.
Which of the following describes an immobilized enzyme?
A.An enzyme that has been denatured.
B.An enzyme that is fixed to an inert or insoluble material.
C.An enzyme found in the nucleus.
D.An enzyme that can only work in the dark.
- 3.
What is meant by the 'collision theory' in enzyme activity?
A.Enzymes must hit the cell wall to work.
B.Substrates and enzymes must collide with sufficient energy and correct orientation.
C.Enzymes collide with each other to produce heat.
D.Substrates collide to form enzymes.
Download the worksheet for Molecular Biology - Enzymes to practice offline. It includes additional chapter-level practice questions.
Structure of DNA and RNA
SubtopicStructure of DNA and RNA under Molecular Biology for Grade 11 IB.
Preview questions (no answers)
- 1.
Which of the following nitrogenous bases is unique to DNA and is NOT found in RNA?
A.Adenine
B.Guanine
C.Cytosine
D.Thymine
- 2.
If a DNA strand has the sequence , what would be the sequence of the mRNA transcribed from it (assuming the complementary base pairing)?
A.B.C.D. - 3.
What is the biological importance of the hydrogen bonds between the two strands of DNA?
A.They make the backbone very strong
B.They allow the strands to be separated easily for replication
C.They prevent the DNA from twisting into a helix
D.They link the sugar to the phosphate
Download the worksheet for Molecular Biology - Structure of DNA and RNA to practice offline. It includes additional chapter-level practice questions.
DNA Replication, Transcription, and Translation
SubtopicDNA Replication, Transcription, and Translation under Molecular Biology for Grade 11 IB.
Preview questions (no answers)
- 1.
What molecule is produced by the transcription of a gene?
A.DNA
B.RNA
C.Protein
D.Amino acid
- 2.
Which of these is NOT a stage of translation?
A.Initiation
B.Elongation
C.Termination
D.Replication
- 3.
During transcription, RNA polymerase binds to a specific DNA sequence called the:
A.Origin of replication
B.Promoter
C.Codon
D.Anticodon
Download the worksheet for Molecular Biology - DNA Replication, Transcription, and Translation to practice offline. It includes additional chapter-level practice questions.
Cell Respiration
SubtopicCell Respiration under Molecular Biology for Grade 11 IB.
Preview questions (no answers)
- 1.
Which of the following is a feature of the mitochondrial matrix?
A.It contains enzymes for the Krebs cycle
B.It is where glycolysis occurs
C.It is a fluid-filled space between the two membranes
D.It is where all the oxygen is produced
- 2.
Which enzyme is responsible for synthesizing ATP from ADP and inorganic phosphate using a proton gradient?
A.ATP synthase
B.DNA polymerase
C.Amylase
D.Lipase
- 3.
How many times does the Krebs cycle turn for every one molecule of glucose oxidized?
A.1
B.2
C.3
D.4
Download the worksheet for Molecular Biology - Cell Respiration to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
If a plant is exposed to light but has no , which of the following will occur?
A.Glucose will still be produced
B.The light-dependent reactions will occur, but the Calvin cycle will stop
C.Oxygen will not be produced
D.The plant will produce more RuBP and less starch
- 2.
Which of the following colors has the longest wavelength in the visible spectrum?
A.Blue
B.Green
C.Yellow
D.Red
- 3.
Why is the temperature a limiting factor for photosynthesis?
A.Because it affects the kinetic energy of enzymes like Rubisco
B.Because light cannot travel through cold air
C.Because water freezes inside the chloroplast at
D.Because only dissolves at high temperatures
Download the worksheet for Molecular Biology - Photosynthesis to practice offline. It includes additional chapter-level practice questions.