Answer:
A truncated protein refers to a protein that gets shortened due to a mutation, which does not allow the process of translation to take place properly. The formation of a truncated protein can take place due to a frameshift mutation of one or two base pairs. In such kind of mutation, a single or two base pairs get withdrawn from the sequence resulting in the formation of a completely changed triplicate codon sequence, which may result in the generation of a truncated protein comprising a different set of amino acids.
A nonsense mutation can also result in the formation of a truncated protein. A nonsense mutation generally codes for certain kinds of amino acid, however, post mutation can get converted into a stop codon. This transformation can result in the formation of a truncated protein.
Deletion or insertion at the chromosomal level can also result in the formation of a truncated protein. As insertion and deletion of a certain concentration of DNA can probably lead to the formation of a novel codon that can either be a nonsense codon or a stop codon, which may eventually result in the formation of a truncated protein.
Hence, the correct answers are statements 1st, 2nd, 3rd, 4th, and 6th
The information from a signal molecule present outside the cell elicits intercellular response when the G protein coupled receptors interact with the wide variety of molecules on the outer surface of the cells.
G Proteins are the specialized proteins having the ability to bind GTP and GDP and is of three units called Alpha, Beta and Gamma subunits which together formed G proteins.
When G protein is activated it will bind GTP and each receptor binds in lock and key method and binding result into conformational change which will trigger a complex chain of events influencing different cell function.
Features exhibited by Signal Transduction System are:
1. Specificity- Signal molecules fits binding site on its complementary receptor. Other signal do not fit
2. Amplification- When enzymes activates enzymes, the number of affected molecules increases.
3. Desensitization- Receptor activation triggers a feedback circuit that shuts off the receptor or removes it from the cell surface.
4. Integration - When two signals have opposite effects on a metabolic characteristics outcome results from the integrated input from both the receptor.
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Answer:
that's an pretty interesting question
Explanation:
For the simple reason that no digestion takes place in the human intestines. Digestion takes place in the stomach. Intestines are where the nutrients are absorbed into the body, and the conditions there are much more favourable for parasites like tapeworms. The stomach produces hydrochloric acid strong enough to burn a hole in a rug and is also home to lot of other strong digestive enzymes. Any tapeworm venturing there would get digested in seconds.
I think the correct answer from the choices listed above is option D. Cross-pollination in corn plants is the mode of reproduction that is incapable of producing clones. With this reproduction, the result varies widely and the resulting plant is not the same variety of the parent plant.
