Pepsin becomes completely inactive at a pH of about 3.5 because the protein chain in the enzyme is denatured.
The correct answer is B) The protein chain in the enzyme is denatured, permanently inactivating it as the pH approaches 7.
Enzymes are specialized proteins that facilitate chemical reactions in the body. Pepsin, being an enzyme, has an optimal pH range for activity, which is between 0.5 and 2.5 in this case. Pepsin works by breaking down proteins into smaller peptides. However, when the pH increases and approaches 7, the protein chain in pepsin becomes denatured, resulting in a permanent loss of its catalytic function.
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All living organisms are composed of microscopic building blocks called cells, which are the structural and functional unit of life because this cell has many organelles and genetic materials that carry out different cellular functions.
The cell is the structural and functional unit of life, and it is microscopic in size. Cells join together to form tissue, and tissue joins together to form organs, which perform various functions in the multicellular organism.
The cell contains organelles such as the nucleus, which contains genetic components such as DNA. Genes that encode genetic information are present on the DNA, and depending on the gene, the cell does its function. The cell regulates both unicellular and multicellular organisms, maintains homeostasis, performs different functions, etc.
Hence, all living organisms are composed of microscopic building blocks called cells, which are the structural and functional units of life and consist of geneticmaterials.
Learn more about the cell here.
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B.It is present towards the boundary of the root, lined by the cortex, and has the tissues like parenchyma and collenchyma inside it.
C.It is present between the epidermis and the endodermis and has tissues like chlorenchyma inside it.
The correct answer is option A,
It is present at the center of the root, surrounded by the pericycle, and has the vascular tissues like xylem, phloem, and cambium inside
Reason:
In vesicular plant species, stele is found in the central part of the stem and root. It majorly consists of vascular tissues with or without the pith. It is located adjacent to the cortex but separated by the endodermis. Its vasculature consists of Xylem and Phloem. It is further bounded by the one or more layer of cell called as pericycle.