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WorksheetsBio Revision Sem 2 Set 3
Total questions: 40
Worksheet time: 40mins
Which of the following statements show characteristics of Archaebacteria?
I. The cell walls do not contain peptidoglycan.
II. There are no membrane-enclosed organelles within their cytoplasm.
III. Their DNA consist of histone proteins.
IV. Their membrane lipid has unbranched hydrocarbon chain.
I, II and III
II, III and IV
I, II and IV
I, III and IV
the Gram-positive bacteria stain purple because
they form endospore
they have cellulose layer
they have thick peptidoglycan layer
they have thin peptidoglycan layer
Which of the following is the unique characteristics for Kingdom Plantae
cell wall consist of peptidoplycan
carbohydrate storage is glycogen
has alternation of generation
motile
Angiosperms are the most successful terrestrial plants. Which of these features is unique to them and helps account for their success?
Dominant gametophytes
Fruits enclosing seeds
Embryos enclosed within seed coats
Sperm cells without flagella
Phytoplankton floats and produces 50% of the worlds oxygen. It is most often found in which ocean zone?
aphotic zone
photic zone
neritic zone
intertidal zone
Which statement best describes the predator-prey relationship displayed on this graph?
There is no relationship between the predator and prey.
When the prey population increases, the predator population decreases.
When the prey population increases, the predator population increases.
when the predator population increases, the prey population increases.
What is ecosystem?
A condition that occurs when two or more organisms compete for the same resources within an ecological community
All the biotic and abiotic factors and the interactions among them in a given area
The maximum number of organisms an ecosystem can support
A relationship in which two organisms are mutually dependent on each other for survival
A new river forms and splits two populations, causing ______________ speciation
Sympatric
Allopatric
Extreme
Convergent
Increasing the substrate concentration in an enzymatic reaction could overcome which of the following?
Allosteric inhibition
Insufficient cofactors
Competitive inhibition
Denaturation of the enzyme
What happens to an enzyme when it is denatured?
The activation energy is doubled
The activation energy is lowered
The optimal temperature for enzyme action is doubled
The shape of the enzyme molecule is change
Cyclic photophosphorylation differs from non-cyclic photophosphorylation in that ___________ is not made from the process
ATP
PGAL
NADH
NADPH
The role of water molecule in light dependent reaction is to
Hydrolyse NADP+ at the end of the ETC
Involve directly in the production of ATP
Replace the excited electron of reaction centre molecule in photosystem II
Involve directly in Calvin Cycle
Which of the following is NOT the structure of haemoglobin?
Each haemoglobin molecule contains 4 haem group
Haemoglobin is a quaternary structure
Every each haem group in haemoglobin can bind with 4 molecule of oxygen
Each haemoglobin has 2 α-chain and 2 β-chain polypeptide subunits
In the chloride shift, ________________ move into the erythrocyte to replace the ______________ that move out.
Chloride ions; carbon dioxide molecules.
Carbon dioxide molecules; chloride ions.
Bicarbonate ions; chloride ions.
Chloride ions; bicarbonate ions.
The acidity due to the accumulation of H+ in erythrocytes is buffered by …
Haemoglobin.
Plasma proteins.
Carbon dioxide.
Oxygen.
The semilunar valves are only open during which phase
atrial contraction and ventricular filling
isovolumetric contraction
ventricular systole
isovolumetric relaxation
If the β-cells of the pancreas of a mouse do not function, what will happen to the mouse?
I glycolysis is stimulated
II the synthesis of protein is stimulated.
III the breakdown of glycogen is stimulated.
IV the production of glucose from sources other than glycogen is stimulated.
I and III only
III and IV only.
II, III and IV only
II and IV only
Which of the following are true about the mechanism of action for steroid hormone?
I. The hormone crosses the plasma membrane.
II. The hormone acts on DNA.
III. Transcription and translation occur.
IV. The hormone combine with its receptor at the plasma membrane.
V. ATP changes to cyclic AMP.
I, IV and V
II, III and IV
III, IV and V
I, II , III and V
The sodium-potassium pump of neurons pumps......
Na+ and K+ into the cell.
Na+ and K+ out of the cell.
Na+ into the cell and K+ out of the cell.
Na+ out of the cell and K+ into the cell.
Which of the following is a direct result of depolarizing the presynaptic membrane of axon terminal?
Voltage-gated Ca2+ channels in the membrane open.
Synaptic vesicles fuse with the membrane.
The postsynaptic cell produces an action potential.
An EPSP or IPSP is generated in the postsynaptic cell.
In order to flower, a short-day plant needs a
burst of red light in the middle of the night
burst of far-red light in the middle of night
day that is longer than a certain length.
night that is longer than a certain length
Arrange the steps of humoral immune response in the proper order
1. Plasma cell secrete antibodies
2. T-helper cells interact with B cells displaying the same antigen-MHC complex
3. Contact with antigen
4. Clones of B cells produced
5. Fragmentation of antigen
3, 4, 2, 1, 5
3, 5, 2, 4, 1
4, 3, 2, 1, 5
1, 3, 5, 2, 4
