The internal cross walls in an earthworm are known as septa, which divide the earthworm's body into segments, aid in locomotion, and play a role in respiration and excretion.
The internal cross walls that separate the inside of an earthworm are called septa(singular: septum). These septa compartmentalize the earthworm's body into a number of segments. The septa provide structural integrity to the earthworm's body, help in locomotion by allowing different body segments to move independently, and also play a crucial part in the earthworm's respiration and excretion processes.
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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.
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true or false
b. chemical changes and flow of water
c. physical changes and flow of energy
d. physical changes and flow of water
Answer:
a. chemical changes and flow of energy
Explanation:
Energy flow from one organisms of one tropic level to other, matter cycling and transformation of energy are the functions that sustain the ecosystem. Transformation of solar energy into chemical energy by plants serves as energy source for all heterotrophic living beings in the system. The heterotrophic organisms digest the ingested food (chemical change) to release energy to support their life processes. The energy stored at one tropic level is carried to next tropic level via food chain and food webs and represents the interaction between living components of ecosystem.
b. increases
c. remains the same
Answer: a. decreases
Explanation:
A population density can be define as the number of individuals in a population of a species living in a unit of area in a particular time. The population density can be influenced by number of births, deaths, immigration, emigration and competition. The number of live birth in a concerned population and immigration (introduction of the new members) are likely to increase the population density of a region. But the number of deaths and emigration (the members of the same population move to a new habitat), and the competition (the members of the same species may compete among themselves for the same resources, the superior one will receive the resources and the inferior one will loose and may die) will decrease the population density.
According to the given situation, death rate and competition among the individuals will likely to decrease the population density.
The statement that correctly describes the stage in cell division shown in the image is the cell is in telophase II of meiosis because the cell is separating and contains two copies of each chromosome. The correct option is D.
The process by which new cells are created from more mature cells is known as cell division. Each and every eukaryotic cell engages in this process. There are various steps in the procedure. Every component of the cell is split into two during the process, which results in the creation of a duplicate of the original cell.
Telophase is the last stage of cell division. In this stage, the material in the cell is divided and in this step, the plasma membrane divides and separates the two cells.
Thus, the correct option is D. the cell is in telophase II of meiosis because the cell is separating and contains two copies of each chromosome.
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Answer:d
Explanation: