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Answer:
A producing colored sparks in fireworks
C rusting in the presence of water and oxygen
these are the correct answers
The best protection from Haemophilus influenza that causes infant meningitis is administration of conjugate vaccines.
Vaccines are injections administered into body to provide protection. They are based on the principle that prior introduction to weakened or killed from a microorganisms produced natural immunity against it which is remembered by the body by memory cells.
The conjugate vaccines are combination of weak and strong antigens which results in stronger immunity against weak antigens. The conjugate vaccine of Haemophilus influenza comprises polysaccharide of the microorganism. Strong antigen are also known as carrier proteins and in this case are either of tetanus, diptheria toxoid or its mutant toxin of diptheria.
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Answer:
c. They produce functional β-galactosidase that cleaves X-gal.
Explanation:
β-galactosidase is an enzyme capable of catalyzing the enzymatic hydrolysis of β-galactosides into monosaccharides by hydrolyzing the β-glycosidic bond. On the other hand, X-gal is an analog of lactose composed of galactose, which is widely used in laboratories for the detection of β-galactosidase. In the presence of β-galactosidase, X-gal is hydrolyzed by cleaving its β-glycosidic bond, thereby confirming the presence of β-galactosidase.
