Calcium ions are involved in many mechnisms: for example, stabilization of cell wall structures, acidic growth, ion exchange properties, control of the activities of wall enzymes. All these properties originate from the tight binding of calcium ions to the pectins present in the cell walls.
With the pic we can say virus is lying in the border line
I know number 2 off the top of my head:
1. Cells are the most basic unit of life.
2. All living things are composed of cells.
3. Cells come from other cells.
The answer is <span>A. all refer to the synthesis of macromolecules.
Let's go through all choices:
</span><span>A. all refer to the synthesis of macromolecules. - CORRECT - DNA, RNA, and proteins are macromolecules. Replication refers to DNA synthesis, transcription refers to the RNA synthesis, and translation refers to protein synthesis.
B. - INCORRECT - because of the word <em>respectively</em>. It would mean that replication refers to RNA synthesis and transcription refers to the DNA synthesis which is not true.
C. - INCORRECT - none of those molecules requires polysaccharides synthesis.
D. - INCORRECT - exergonic reactions involve releasing of energy while mentioned processes use energy.
E. - INCORRECT - nucleotides are building blocks only for DNA and RNA. Building blocks of proteins are amino acids.</span>
