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ch4aika [34]
3 years ago
7

An operon encodes enzymes for making an essential amino acid and is regulated like the trp operon. Which of the statement is tru

e?
A.The amino acid inactivates the repressor.
B.The amino acid acts as a corepressor.
C.Inducible enzymes are produced.
D.The repressor is active in the absence of the amino acid.
Biology
1 answer:
Serhud [2]3 years ago
4 0
The answer is A The amino acid inactivates the repressor
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<h2>Answer:</h2>

There are three types of meristems on the basis of position, i.e

  1. Apical meristem.
  2. Lateral meristem.
  3. Intercalary meristem.
<h2>Explanation:</h2>

A meristem is the tissue present in  most plants containing undifferentiated cells, found in zones of the plant where growth can take place. Generally differentiated cells(the cells other than meristems) do not divide and produce of a different type of cells.

Meristems are classified on the basis of their location in the plant:

  1. Apical meristem - these are the meristems located at root and shoot tips of the plant.
  2. Lateral meristem - these are the meristems located in the vascular and cork cambia in plants.
  3. Intercalary meristems - these are the meristems located at internodes, or stem regions between the places at which leaves attach, and leaf bases.

Result: There are 3 types of meristems.

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