Answer:
The three dimensional structure of a protein has the following levels: primary, secondary, tertiary and Quaternary.
1. Primary structure of protein is the unique order or <u>sequence of amino acids</u> in a polypeptide chain. The amino acids are linked together by<u> peptide bonds.</u>
2. Secondary structure of protein is the <u>folding or coiling of the polypeptide</u> chain to form a three dimensional structure. It is of two types: α-helix and β-sheets. This structure is stabilized by <u>hydrogen bonding</u>.
3. Tertiary structure of a protein refers to the<u> compact globular structure</u> stabilized by <u>non-specific hydrophobic interactions, hydrogen bonding, salt bridges and disulfide bonds</u>.
4. Quaternary structure of a protein is formed by the<u> aggregation of multiple polypeptide chains.</u> It is stabilized by <u>non-covalent interactions and disulfide bonds.</u>
Answer:
Ka = 4.9 X 10^-9
Explanation:
when the pH is 4.95
the [H+] = 10^-4.95
[H+] = 1.122 e-5
since the equilibrium equation is:
HCN <=> 1 mole H+ & 1 mole CN-
then
[H+] = [CN-]
when
HCN <=> H+ & CN-
Ka = [ H+] [CN-] / [HCN]
Ka = [ 1.122 e-5] [ 1.122 e-5] / [0.255]
Ka = 1.256 e-10 / 0.255
Ka = 4.94 e-9
which rounds off to 2 sig figs into
Ka = 4.9 X 10^-9
======================
p.s. it was the pH pf 4.95 that limited the calculations to 2 sig figs
The answer is burning paper
<span>chemicals reacting are written on the left, what is formed is written on the right after the = sign
eg Copper + oxygen = copper oxide.
Hope this helps , mark as brainliest and say thanks THANKS..</span>
Answer:
other the effect of temperature on plants