<u>Mucins</u> are water-soluble, complex glycoproteins that are secreted by goblet cells.
Explanation:
Goblet cells, named after their goblet-like shape, are usually found in the epithelium of respiratory and intestinal tracts in the body. Their main function is to produce mucus (primarily made up of mucins), a slippery combination of proteins, water and sugars, that serves three main functions:
- The barrier function: By trapping the unwanted/harmful particles that we inhale and preventing them from entering our system.
- The protection function: By keeping the hair-like cilia lubricated and moist to remove the harmful particles.
- The defence function: Mucus is made up of certain enzymes, antibodies and proteins that act as a defence mechanism for the body.
A unique property of mucins is their capability to form gels - sticky and viscous substances that work both as lubricants as well as defensive chemical barriers in the body.
Answer:
Weak H-bonds between partial (+) charge of H and partial (-) charge from the unpaired electron of N or O.
Explanation:
The peptide bond is formed. The peptide chain is in the P site and at the A site, the next amino acid (specified by the codon on the mRNA) is brought by the tRNA -
1. the polypeptide in the P site is detached from its tRNA and a peptide bond is formed between the last amino acid of the polypeptide and the amino acid attached to the tRNA in the A site.
This is catalyzed by a ribozyme.
Answer: The answer is D.
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