<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.
Gel filtration and SDS-PAGE could be used for <u>determining a molecular weight of proteins</u>, such as tyrosinase. In both methods, molecules are separated based on their size. <u>Gel filtration</u> measures the molecular weight of <u>native proteins</u> and <u>SDS-PAGE</u> measures the molecular weight of <u>denaturated proteins</u>.
Answer:
C
Explanation:
Producers require solar energy to start photosynthesis to create the glucose they need, so lower solar energy means less photosynthesis.
Semipermeable means something can be penetrated by a few things. that being said choices A and B can be eliminated.
Choice D would negate semi as it says all polar molecules, leaving choice C as the best answer
I think the answer is Passive
