WorksheetsBioXline 2 S12T4
Total questions: 30
Worksheet time: 14mins
Which of the following statement regarding photosynthesis is TRUE?
The light independent reaction occurs during exposure to light
The light dependent reaction is also known as Calvin cycle
ATP and NADPH are produced during the light independent reaction
Organic molecules are produced during the light independent reaction
What causes electron deficiency in the reaction centre of Photosystem II?
The excitation of electron at the reaction centre
The formation of NADPH
The photolysis of water
The transfer of electron to the Photosystem I
What are the products of light dependent reaction in photosynthesis?
ATP, CO2 and water
ATP, NADPH and oxygen
ATP, NADP+ and oxygen
ATP, CO2 and glucose
Which of the following processes are involved in the light dependent reactions?
Carbon fixation
Chemiosmosis
Reduction of NADPH
Regeneration of RuBP
Which of the following DOES NOT occur during one of the stages of photosynthesis?
Light energy is captured
Pyruvate is produced
ATP and NADPH are produced
Glucose is made using carbon dioxide
The light reactions occur in the ________ while the Calvin cycle occurs in the ________
stroma . . . thylakoid membranes
cytoplasm . . . stroma
thylakoid membranes . . . stroma
thylakoid membranes . . . cytoplasm
Light is required for the light dependent reactions because
it is the source for electrons
it will form NADPH+ H+
it excites electrons in the reaction center
it splits ATP molecules
Which one is NOT the advantage of the light independent process in C4 plants compare to C3 plants?
PEP carboxylase has high affinity towards carbon dioxide
Effectiveness of Rubisco is increase in bundle sheath cells of C4 plants
More carbon dioxide diffuses into the mesophyll cells of C4 plants
C4 plants produce oxaloacetate as the first product of light independent reaction
Which of following are FALSE about differences between chloroplast in bundle sheath cells and mesophyll cells of C4 plants?
Chloroplast of bundle sheath cell are many, while chloroplast of mesophyll cell are few
CO2 fixation by RuBP carboxylase occur in chloroplast of bundle sheath, while CO2 fixation by PEP carboxylase occur in chloroplast of mesophyll cell
Chloroplast of bundle sheath cell has large grana, while chloroplast of mesophyll cell has small grana
CO2 fixation by PEP carboxylase occur in chloroplast of bundle sheath, while CO2 fixation by RuBP carboxylase occur in chloroplast of mesophyll cell
Which intermediate metabolite is formed during light independent reaction in photosynthesis?
NADP+
ADP
G3P
Ribulose bisphosphate
30% of CO2 are transported by binding to haemoglobin to form
carboxyhaemoglobin
haemoglobinic acid
carbaminohaemoglobin
oxyhaemoglobin
Oxyhemoglobin can easily dissociate in a condition of
low pH
low partial pressure of carbon dioxide
low hydrogen ion concentration
high partial pressure of oxygen
Oxyhaemoglobin will dissociate when
blood passes through the capillaries of the lung
blood passes through the capillaries of the liver
hydrogen ion concentration in the blood decrease
partial pressure of oxygen increase
Which of the following statements is TRUE about the Bohr Effect?
A decrease in blood pH causes the graph to shift to the left showing the affinity of hemoglobin for oxygen is lowered
A decrease in blood pH causes the graph to shift to the right showing the affinity of hemoglobin for oxygen is lowered
A decrease in blood pH causes the graph to shift to the left showing the affinity of hemoglobin for oxygen is increased
An increase in blood pH causes the graph to shift to the right showing the affinity of hemoglobin for oxygen is increased
Which of the following is TRUE about the oxygen dissociation curve of hemoglobin?
It shows the effect of the carbon dioxide on the curve.
It is a curve showing the percentage saturation of hemoglobin with oxygen at different partial pressure of oxygen
The X-axis on the graph shows the percentage saturation of haemoglobin with oxygen.
The Y-axis shows the concentration of oxygen as partial pressures
Which of the following statements is true?
The breathing rate is completely under voluntary control.
The chemoreceptors are located on the diaphragm and intercostal muscle
During expiration, the external intercostal muscles and diaphragm contract
CO2 released from respiration is detected by chemoreceptors
In the regulation of breathing rate, which statement is TRUE about chemoreceptor in the carotid body?
Sensitive to increase in partial pressure of carbon dioxide in blood
Sensitive to very low partial pressure of carbon dioxide
Sensitive to low hydrogen concentration of the blood
Sensitive to increase in blood pH
Which of the following factors has the highest effect in the increasing breathing rate in mammals?
Reduction of oxygen concentration in the blood
Increase of carbon dioxide concentration in the blood
Reduction of oxygen in the alveolus
Increase of carbon dioxide in the alveolus
Which of the following statements about guard cells are FALSE?
Kidney shaped
Thick inner wall
Contain chloroplast
Elastic inner wall
Which of the following causes the guard cells to open?
Increase in the water potential of the guard cells
Outward movement of water by osmosis from the guard cells
Accumulation of glucose in the guard cells
Outward movement of glucose from the guard cells
Which of the following are FALSE of the sinoatrial node?
Function as pacemaker
Stimulate contraction of the atria
Initiates relaxation in the ventricles
Located at the right atrium wall
About three litres of fluid including some blood proteins is forced out from the blood capillaries of a healthy person each day. The fluid and protein lost are returned to the circulatory system by
active transport of the endothelial cells of capillaries
passive diffusion of interstitial fluid into blood capillaries
the lymphatic system
the villi of small intestine
Lymph nodes are widely distributed throughout the body along the lymphatic veins; they filter the _________ before it is returned to the _______
lymph, blood
lymph, heart
heart, lymph
blood, heart
Which statement in NOT TRUE of the lymphatic system?
Lymph has fewer plasma protein molecules than the blood plasma
Lymph has fewer plasma protein molecules than the blood plasma
Lymph has fewer plasma protein molecules than the blood plasma
The thoracic duct carries the lymph to the left subclavian vein
Which of the following is FALSE regarding the translocation that occurs at the source and of the sieve tube element according to the Pressure Flow Hypothesis?
Sugar diffuses from mesophyll cells into the sieve tube element
High concentration of sugar in sieve tube lowers the water potential
Water from neighbouring cells enters the sieve tube by osmosis
High hydrostatic pressure is created in the sieve tube
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 decreased
The Casparian strip in the endodermis prevents the backflow of water and mineral
Which of the following functions as the sink in the translocation of food?
Photosynthesising leaves and stems
Photosynthesising leaves and meristematic tissues
Roots and stems
Growing and mesophyll tissues
Water movement through cellulose cell wall without entering protoplast of root cells is called
symplast pathway
apoplast pathway
transmembrane pathway
vacuolar pathway
Which of the following events occur during ventricular systole?
Tricuspid valve open
Bicuspid valve closed
Semilunar valves closed
AV valve open
The atrium and the ventricle are separated by
Semilunar valve
Atrioventricular valve
Atrioventricular node
Bundle of His
