#Question id: 32224
#Unit 2. Cellular Organization
For optimal activity, lysosomal acid hydrolases requires:
a. Activation by proteasomal degradation
b. Activation by proteolytic cleavage
c. Requires an acid environment
#Question id: 1023
#Unit 4. Cell Communication and Cell Signaling
Which amino acid(s) is/are found only in the cell walls of bacteria?
#Question id: 11707
#Unit 7. System Physiology – Animal
A human who has no access to fresh water but is forced to drink seawater instead will ________.
#Question id: 11211
#Unit 7. System Physiology – Animal
The following steps refer to various stages in transmission at a chemical synapse.
1. Neurotransmitter binds with receptors associated with the postsynaptic membrane.
2. Calcium ions rush into neuron's cytoplasm.
3. An action potential depolarizes the membrane of the presynaptic axon terminal.
4. The ligand-gated ion channels open.
5. The synaptic vesicles release neurotransmitter into the synaptic cleft.
Which sequence of events is correct?
#Question id: 2590
#Unit 2. Cellular Organization
Following graph represents dynamic instability of microtubules in vitro. Identify the correct activity at A, B, C and D.