Answer : The length of protein will be, 94.1 A⁰
Explanation :
First we have to calculate the amino acid residue.

Given:
Length of single strand of protein = 69.0 kDa
Mean residue mass = 110 Da

Now we have to calculate the number of turns in protein.

As there are 3.6 amino acid per turn of the alpha-helix.

Now we have to calculate the length of the protein.

As, we know that the length of each turn = 0.54 A⁰

Thus, the length of protein will be, 94.1 A⁰
<u>Answer:</u> The main group metal produce a basic solution in water and the reaction is 
<u>Explanation:</u>
Main group elements are the elements that are present in s-block and p-block.
The metals that are the main group elements are located in Group IA, Group II A and Group III A.
Oxides are formed when a metal or a non-metal reacts with oxygen molecule. There are two types of oxides which are formed: Acidic oxides and basic oxides.
- Acidic oxides are formed by the non-metals.
- Basic oxides are formed by the metals.
When a metal oxide is reacted with water, it leads to the formation of a base.
The general formula of the oxide formed by Group II-A metals is 'MO'
The chemical equation for the reaction of metal oxide of Group II-A and water follows:

Hence, the main group metal produce a basic solution in water and the reaction is 
Answer:
1. DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.
2. both
Explanation: Since errors can occur when DNA replicates itself, mutations can occur in both asexually and sexually reproducing organisms.
+2, +1 is the charge of copper