All of the following are true of carbohydrates except 1. they are the structural elements in cell walls 2. they are only found in plants and bacteria 3. they make up larger compounds like fats and amino acids 4. they serve as energy storage for organisms

The correct answer option is 3. they make up larger compounds like fats and amino acids.

Explanation:

A carbohydrate is a biological molecule that consists of carbon (C), hydrogen (H) and oxygen (O) atoms.

It is one of the 4 main macro-molecules in cells that are made largely from Carbon, Oxygen, Hydrogen and Nitrogen. Therefore, option 3. 'they make up larger compounds like fats and amino acids' is incorrect.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-