Mock Exam Paper F Marking Scheme
Marking Scheme Mock Biology Exam L C 2016
Section A Answer any five questions
Any five answers.
Benedict’s test / Fehling’s solution
Pepsin / Pepsinogen
Iron / Copper / Zinc (any two)
Colour change: Red/yellow/brown to blue/black
Educated guess or (possible) explanation based on observations
Hypothesis (or explained) supported (by experiment)
A theory that has been proven valid under all tested conditions
(Set up for) comparison
A harmless, tasteless pill given to the control group to provide a comparison to the active drug being tested.
(X) Hepatic vein
(Y) Hepatic portal vein or portal system
Produces bile / detoxifies the body / breaks down amino acids to urea / converts excess glucose to glycogen / stores some vitamins and minerals / produces clotting proteins / produces cholesterol which is needed to produce some hormones / produces heat to maintain homeostasis (any four)
Chromosome uncoiling / transcription / DNA replication or duplication / Production of new organelles (any two)
Haploid cells have one copy of each chromosome. Diploid cells have two copies of each chromosome.
Cancer is the name given to a group of disorders in which cells lose control over their rate of mitosis and number of times mitosis occurs.
Causes: Genetic / viral / cigarette smoking / exposure to asbestos / exposure to some types of radiation / any other valid carcinogen
Treatments: Radiotherapy / Chemotherapy / Surgery / Monoclonal antibodies / Any other valid treatment option
Cells with common function (or with common structure)
A = vessel
B = tracheid
Transports water and dissolved minerals from the root to the leaves
Lignin is a strong material found in the cell walls of xylem vessels and tracheids. It provides reinforcement.
Function: Transports food from photosynthesis in leaves to t...