WorksheetsBio-catalyst 3
Total questions: 23
Worksheet time: 12mins
Which of the following reactions is catalyzed by carbonic anhydrase?
Combination of carbon dioxide and phosphoenolpyruvate
Combination of carbon dioxide and water to form carbonic acid
Dissociation of carbonic acid to produce hydrogen ion and hydrogen carbonate ion.
Elimination of carbon dioxide from pyruvate
Which of the following reactions occur in erythrocytes in the pulmonary capillaries?
Carbon dioxide in the blood is transported in the form of
I. Carbonic acid
II. Carbaminohaemoglobin
III. Carboxyhaemoglobin
IV. bicarbonate ion
II and IV
III and IV
I, II and IV
I, III and IV
Each hemoglobin molecule can bind reversibly with
one atom of oxygen
one molecule of oxygen
two molecules of oxygen
four molecules of oxygen
Which of the following is a FALSE statement? If the action of carbonic anhydrase in red blood cells in tissue increases, one would be expected an increase in.......
Concentration of reduced haemoglobin
Bicarbonate ions in plasma
Diffusion of chloride ions out of cells
The chloride shift
Most of the carbon dioxide produced by humans is
converted to bicarbonate ions by an enzyme in red blood cells
bound to haemoglobin.
transported in the erythrocytes as carbonic acid
bicarbonate ions bound to haemoglobin
The body fluid and some blood proteins that leave the capillaries return the circulatory system via
Active transport
Lymphatic system
Diffusion from the interstitial fluid into the capillaries
Villi lining the small intestine
Which of the following structures is considered to be the pacemaker of the heart?
Atrioventricular node
Sinoatrial node
Atrioventricular bundle
Purkinje fibers
Which of the following is not a lymphoid organ?
Tonsil
Spleen
Bone marrow
Kidney
Root pressure is caused by...................
Osmotic flow of water into xylem
Adhesion of water molecules
Cohesion of water molecules to xylem walls
Transpiration of water in leaves
The transport of sugars and other organic molecules in plants is known as
Transpirational pull
Guttation
Assimilation
Translocation
The basic theory of cohesion-tension is
The entrance of water and ion actively through cell membrane of the root epidermis
The reduction of water potential gradient from the soil through plants to atmosphere
The formation of the weak bonds between water molecules, and water molecules & vessel walls
The movement of water into root tissue through stem xylem and leaf xylem, then to the atmosphere
Which statement is false about Casparian strip?
I. It is thickened strip within the endodermis
II. It wraps up the entire cell of the endodermis
III. It ensures movement of water in the root by the apoplast way only
IV. It consists of suberin which is not permeable to water
I and II
II and III
I, II and IV
II, III and IV
Homeostatic mechanisms...................
Keep variables exactly at the set point
Help to keep a relatively constant internal environment in the body
Act to keep values out of the normal range
Usually operate by positive feedback
Which of the following statements regarding glycogenolysis is NOT true?
Glycogenolysis releases glucose into the blood
Glycogenolysis helps correct hypoglycemia
Glycogenolysis is the formation of carbohydrates from monosaccharides
Glycogenolysis is stimulated by glucagon
Midmorning, blood glucose levels fall and stimulate the secretion of which hormone?
Insulin
Glycogen
Glucagon
Aldosterone
Which of the following would be least likely to be found in the glomerular filtrate?
plasma protein
glucose and amino acids
water
urea
An increase in the secretion of insulin produces
An increase in blood sugar level
An increase in the glucose permeability of cells
A decrease in glucose metabolism in the body cells
An increase in the conversion of glycogen to glucose
The greatest amount of filtrate gets reabsorbed from which part of the nephron?
glomerulus
proximal convoluted tubule
distal convoluted tubule
collecting ducts
The descending limb of the loop of Henle.............................
is not permeable to water
is freely permeable to sodium and urea
pulls water by osmosis into the lumen of the tubule
contains fluid that becomes more concentrated as it moves down into the medulla
Husband to Siti Nur Haliza is..............
Dato' K
Dato' L
Dato' M
Dato' N
Are you hungry? Me too......
Yes
No
What is your target for Biology this sem?
A
B
C
always A
