Answer:
In the lock-and-key model of enzyme action, the substrate fits into the active site of the enzyme. Enzyme catalyzes a chemical reaction which starts with the binding of the substrate with the active site (specific region) present in the surface of the enzyme.
Some changes occur in the distribution of electrons in the chemical bonds which are present on the substrate and cause the reaction to leads the formation of products by the binding of the substrate to the enzyme.
The product which is released from the enzyme surface to regenerate the enzyme for next reaction cycle. The active site has unique ability means only one or few enzymes can react with similar compounds.
In the lock and key theory, the enzyme is the lock and key is the substrate. Which means only correct size substrate can fit into the active site of the enzyme.
The correct answer is rhizome.
Rhizome is a modified horizontal underground stem. Rhizome may or may not be fleshy. It becomes fleshly when it stores food as in ginger. It looks like root but it is not root because there is presence of nodes, internodes, scale like leaves on it and it is frequently develops branches in different direction. Through rhizome many plants propagates vegetatively.
Answer:
A rhizome is a horizontal stem that can divide and grow in several directions at once.
Vacuoles in plant cells aid in preserving the equilibrium of water. A single vacuole may occasionally occupy the majority of a plant cell's inner volume.
Water and other cellular components are stored in the enormous, membrane-bound organelles known as central vacuoles, which are present in plant cells.
Pressure is applied to the surrounding cell components and the cell wall by a central vacuole that is filled with fluid.
The central vacuole has a variety of functions in plant cells, including storing salts, minerals, nutrients, proteins, and pigments, promoting plant development, and contributing significantly to the structure of the plant.
Therefore, central vacuole play an important role in plant cells.
Learn more about central vacuole here:
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Answer:
The correct answer is - ice is less dense than liquid water.
Explanation:
In most of the liquid when they get freeze their molecules come closer to each other, however, in the case of the water the molecules come closer to form a crystalline lattice structure with low energy.
But when it forms crystal the water molecules are pushed apart farther as they have hydrogen bond in them. It causes the property of denser water than ice.
Thus, the correct answer is - ice is less dense than water.
carbon dioxide and uric acid
oxygen and urine
carbon dioxide and urine
The correct answer is option A
Plants performs both the functions photosynthesis and cellular respiration.The waste product of photosynthesis is oxygen that the plant releases in the environment.
Plants also performs cellular respiration and in the process of cellular respiration the waste product is carbon dioxide.
Hence, the waste products are carbon dioxide and oxygen.
B) nodes
C) polyps
D) adenoids
E) peyer patches