The Option D is correct.
- After enzymatic reaction, nothing happens with enzyme and it remain unchanged.
During an enzyme catalyzed reaction the enzyme bonds with a specific substrate at the active site. This is called an enzyme-substrate complex. The substrate is converted into a specific product, but the enzyme remains unchanged. Enzymes accelerate reactions by factors of at least a million.
 
        
             
        
        
        
The mosquito would become more prone to injury due to a weakening of its Exoskeleton.
Exoskeleton, a hard or flexible covering that supports and shields an animal's soft tissues. The phrase refers to the chitinous integument of arthropods, such as insects, spiders, and crustaceans, and includes the calcareous housings of sessile invertebrates like clams. The exterior waxy, water-resistant covering of the arthropod exoskeleton, which is made from the epidermis, is covered by chitinous, and flexible layers. This coating features tiny breathing openings in terrestrial species (spiracles). The exoskeleton has made it possible for arthropods, particularly insects, to overrun the majority of terrestrial ecosystems by avoiding dehydration. Exoskeletons of animals like the lobster have flexible joints that allow for remarkable mobility.
Learn more about Exoskeleton using this link:
brainly.com/question/13022376
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Hello fellow student! I'm here to help. 
 Well, both proteins and nucleus acids are both made up of mostly carbon, hydrogen, nitrogen, and oxygen, the elements are assembled in vastly different ways. 
 
        
             
        
        
        
Answer:
Two synapses.
Explanation:
Synapse or Synaptic cleft is the space two neurons or between a neuron or target organ where the signal is carried by neurotransmitter. Nerve signal first travel through interneuron to motorneuron passing through the first synapse, then the signal will travel to effector organ from motor neuron by passing through second synapse.