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WorksheetsBio X Line Set 2 S11T1
Total questions: 22
Worksheet time: 15mins
How do lactic acid and alcohol fermentation differ?
I. Lactic acid fermentation can occur in large muscles in the human body, while alcohol fermentation occurs in yeast and some bacteria.
II. Lactic acid fermentation produces a 2-carbon compound, while alcohol fermentation produces a 3-carbon compound.
III. Lactic acid fermentation produces lactic acid as a byproduct, and alcohol fermentation produces ethanol.
IV. Carbon dioxide is released only during alcohol fermentation.
I only.
I and II only.
I, II and IV only.
I, III and IV only.
How may ATP will be produced during the production of 1 molecule of acetyl CoA from 1 molecule of pyruvic acid?
3 ATP
5 ATP
8 ATP
38 ATP
In glycolysis, dehydration occurs during the formation of
3-phosphoglycerate.
glyceraldehyde-3-phosphate.
phosphoenolpyruvate.
dihydroxyacetone phosphate
In how many steps, CO2 is released in aerobic respiration of pyruvic acid?
One
Three
Six
Twelve
Hydrogen ions are pumped from the __________ to the ___________ by ___________.
mitochondrial matrix; intermembrane space; simple diffusion.
mitochondrial matrix; intermembrane space; facilitated diffusion.
cytosol; intermembrane space; osmosis.
cytosol; intermembrane space; simple diffusion.
Which reaction is catalysed by the enzyme rubisco?
Carboxylation of ribulose bisphosphate (RuBP)
Decarboxylation of ribulose bisphosphate (RuBP)
Oxidation of 3-phosphoglycerate
Reduction of 3-phosphoglycerate
Which pair of areas within a chloroplast will show the steepest pH gradient between them?
DNA and stroma.
Ribosome and stroma.
Stroma and the space between the outer and inner membrane.
Stroma and the thylakoid space within the thylakoid membrane.
Which of these is NOT a feature of a specialised gas exchange surface?
Large surface area.
Very thick to provide long diffusion distance.
Selectively permeable.
A transport system to maintain diffusion gradient.
1. The Bohr effect describes
a shift to the left in the oxygen-hemoglobin dissociation curve.
enhanced cooperation of oxygen binding to hemoglobin in the lungs.
a shift to the right in the oxygen-hemoglobin dissociation curve.
the conformational structures of hemoglobin as it picks up oxygen in the lungs.
Which of the following events occur during ventricular systole?
Tricuspid and bicuspid valve open and semilunar valves close.
Tricuspid and bicuspid valve close and semilunar valves open.
Tricuspid valve open, bicuspid valve and semilunar valves close.
Tricuspid valve close, bicuspid valve and semilunar valves open.
The following structures are found in the heart:
I. Bundle of His
II. Purkinje fibres
III. Atrioventricular node
IV. Sinoatrial node
Which of the following shows the CORRECT sequence for impulse conduction in the heart?
III, IV, I ,II
III, IV, II, I
IV, III, I, II
IV, III, II, I
The heart sound ‘lub’ is produced during
atrial systole.
atrial diastole.
ventricular systole.
ventricular diastole.
Which statement in NOT TRUE of the lymphatic system?
Lymph has fewer plasma protein molecules than the blood plasma.
Lymphatic vessels are closed at one end.
Returning fluid filtered out from the capillaries to the blood circulatory system.
The thoracic duct carries the lymph to the right subclavian vein.
Which of the following is NOT TRUE in the production of root pressure?
Mineral ions are actively pumped into the xylem by endodermal cells.
ATP is required.
Water potential in the xylem is increased.
The Casparian strip in the endodermis prevents the backflow of water and mineral ions into the cortex cells.
Which of the following components of blood does not enter the nephron?
Ions
Urea
Glucose
Plasma proteins
After a man drinks a glass of glucose, his blood glucose concentration increases quickly above the normal range. If his blood glucose level does not decrease back to the normal range, these conclusions that can be made except
The man has diabetes mellitus.
The man has diabetes insipidus.
His pancreas is not secreting insulin.
Excretion of excess glucose from kidney does not occur.
Which of the following occurs first when a voltage reaches the threshold level?
The K+ ion channels close.
Voltage-gated Na+ ion channels open.
Neurotransmitter reuptake takes place at the synapse.
The membrane hyperpolarises.
What do the thin filaments in myofibrils consists of?
Myosin.
Sarcomeres.
Actin and accessory proteins.
Z lines.
Which of the following is true about short-day plants?
Short-day plants are the same as long-day plants.
Short-day plants are able to flower in autumn.
Short-day plants do not have a critical photoperiod.
Short-day plants will not flower if a short night is interrupted by bright light.
A plant requiring a dark period of at least 14 hours will
flower if a 14-hour night is interrupted by a flash of light.
not flower if a 14-hour night is interrupted by a flash of light.
flower if the days are 14 hours long.
not flower if the days are 10 hours long.
Which of the following statements is TRUE about lymphoid organs?
As the sites of lymphocyte production and/or maturation.
To return the interstitial fluid into bloodstream.
To create a site of antigen-antibody interactions.
To filter blood by recycling the old erythrocytes.
BCG vaccination is an example of
natural passive immunity.
natural active immunity.
artificial passive immunity.
artificial active immunity.
