Answer:
Option B, Xylem --> phloem --> endodermis --> stele --> epidermis --> cortex --> cambium ///
Explanation:
The start of water transportation via roots takes place through the Xylem as these are the specialized cell in roots to intake water from the ground. These cells are arranged in the form of layer and filters the water before transporting. After the filtration in Xylem, water then passes to phloem (which are also part of conducting system of plants and runs parallel to the xylem). After the phloem, water then goes to the central part of the root which is known as stele and then it reaches the epidermis. From epidermis , absorbed water then goes to the cortex of other tissues and organ and finally it reaches the cambium.
Hence, option B is correct
2. Proteins are usually phosphorylated at amino acids that have hydroxyl group-containing side chains.
3. Phosphorylation always decreases the activity of the enzyme.
4. Proteins are usually phosphorylated at the N terminus of the chain.
5. Phosphorylation of proteins is catalyzed by phosphatases.
Answer:
Proteins are usually phosphorylated at amino acids that have hydroxyl group- containing side chains. Other statements are false. Thus, Option 2 is only true.
Explanation:
Proteins are usually phosphorylated at amino acids that have hydroxyl group- containing side chains which are Serine, Threonine and Tyrosine. Thus, the statement is true.
Phosphorylation can enhance or inhibit the activity of an enzyme but cannot activate enzymes. Therefore, the statement is false.
Phosphorylation can enhance or inhibit the activity of an enzyme but cannot activate enzymes. Thus, phosphorylation does not always decreases the activity of an enzyme.
Phosphorylation at the termini I.e., N terminus of a protein chain is relatively rare and usually involves other types of modification.
Phosphorylation of proteins is catalysed by enzymes called protein kinases. Thus, this statement is also false.
To know more about Phosphorylation,
Phosphorylation of proteins can either activate or inhibit protein function, depending on the specific context and the protein involved. Proteins are usually phosphorylated at amino acids that have hydroxyl group-containing side chains, such as serine, threonine, and tyrosine.
Phosphorylation is a common post-translational modification of proteins, where a phosphate group is added to specific amino acid residues. It is catalyzed by enzymes called kinases, which transfer a phosphate group from ATP to the target protein. Proteins can be phosphorylated at various amino acids, including serine, threonine, and tyrosine. This modification plays a crucial role in regulating protein function and cellular processes.
Contrary to statement 1, phosphorylation does not always activate enzymes. It can have diverse effects on protein activity, stability, localization, and interactions with other molecules. Depending on the specific context and the protein involved, phosphorylation can either activate or inhibit protein function.
Statement 2 is true. Proteins are usually phosphorylated at amino acids that have hydroxyl group-containing side chains, such as serine, threonine, and tyrosine.
Statement 3 is false. Phosphorylation does not always decrease the activity of the enzyme. It can have both activating and inhibitory effects on protein function.
Statement 4 is false. Proteins are not usually phosphorylated at the N terminus of the chain. Phosphorylation can occur at various amino acids throughout the protein sequence.
Statement 5 is false. Phosphorylation of proteins is catalyzed by enzymes called kinases, not phosphatases. Phosphatases are responsible for removing phosphate groups, reversing the phosphorylation.
Learn more about phosphorylation of proteins here:
#SPJ14
Answer:true
Explanation: just took the test
b.an increase in oxygen levels in the blood
c.a decrease in the rate of cellular respiration
d.an increase in carbon dioxide levels in the blood?
Answer: The correct answer is D) An increase in carbon dioxide level in the blood.
During exercise, contraction of muscles take place very quickly as they work harder during exercise. As more oxygen is required to burn calories efficiently, the demand for oxygen supply increases.
When we start exercising, body temperature increases as the rate of cellular respiration also increases.
An increase in carbon dioxide in the blood causes increase in heart rate as there is more demand of oxygen for efficient contraction of the muscles.