Answer;
The answer is A. Gametes
Explanation;
Both sperm cells and egg cells are gametes that are both products of meiosis type of cell division. Which means they are haploid,n, they have have number of chromosomes as the normal cells. Gametes are haploid , meaning that they ave just one complete set of chromosomes. Diploid cells are the body cells other than the gametes that have two copies of each chromosome.
The Mediterranean sea stretches 2,400 miles East to West from the coast of the Middle - east to the Strait of Gibraltar.
The average width is 450 miles while the widest point is 990 miles.
The Mediterranean sea is a large body of saline water between Europe, North Africa and Asia. It is connected to the Atlantic ocean in the west via the Straight of Gibraltar.
The Mediterranean basin was home to some of the earliest human civilizations in history.
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Trypsinogen is split by the enzyme enterokinase to form an activated molecule of the protease trypsin. Which of the following would confirm that the activation of trypsin is an example of how a positive feedback mechanism can amplify a biological process?
A. The activated trypsin enzyme can use enterokinase as a substrate
B. The trypsin produced by the reaction is capable of splitting and activating additional trypsinogen molecules
C. If levels of trypsin were to get too high, the trypsin molecules would inhibit the enzyme enterokinase
D. Each mRNA molecule that codes for trypsinogen can be translated repeatedly to form many peptide molecules
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Trypsinogen molecules are first split into the active enzyme Trypsin by enterokinase. Then the Trypsin being a protease itself, works on Trypsinogens and converts them to Trypsin. Thus this is a positive feedback.
Option B
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Trypsinogen is a proenzyme which is secreted by pancreas into the duodenum. Enterokinase is a intestinal enzyme that is secreted from the small intestinal glands. Enterokinase works on the Trypsinogens to convert them into trypsin by splitting a peptide chain from the proenzyme. This trypsin then digests a variety of proteins and peptides from diet.
Trypsin is a protease and the proenzyme Trypsinogen is a protein. So trypsin works on the secreted trypsinogens too and amplify the production of trypsin from the trypsinogens to enhance the digestion process. Thus, a positive feedback chain is seen here.
Protein synthesis can be increased by <span>a) turning on gene expression.</span>
