Which of the following types of compounds do not contain oxygen? alcohols aldehy
ID: 991231 • Letter: W
Question
Which of the following types of compounds do not contain oxygen?
alcohols
aldehydes
esters
amines
ketones
Which of these forces holds the two complementary strands of DNA together?
hydrophobic interactions
disulfide linkages
salt bridges
hydrogen bonds
peptide bonds
Amino acids are linked together by ____ to form proteins.
hydrophobic interactions
peptide bonds
disulfide linkages
hydrogen bonds
alpha linkages
Which of these acids is found in stomach acid?
malic
hydrochloric
phosphoric
acetic
lactic
Which of these statements about strong acids is correct?
Acids which are concentrated.
Acids which have a very high pH.
Acids which dissociate 100% into ions.
Acids which dissociate very little into ions.
Both B and C are correct.
alcohols
aldehydes
esters
amines
ketones
Which of these forces holds the two complementary strands of DNA together?
hydrophobic interactions
disulfide linkages
salt bridges
hydrogen bonds
peptide bonds
Amino acids are linked together by ____ to form proteins.
hydrophobic interactions
peptide bonds
disulfide linkages
hydrogen bonds
alpha linkages
Which of these acids is found in stomach acid?
malic
hydrochloric
phosphoric
acetic
lactic
Which of these statements about strong acids is correct?
Acids which are concentrated.
Acids which have a very high pH.
Acids which dissociate 100% into ions.
Acids which dissociate very little into ions.
Both B and C are correct.
Explanation / Answer
Answer – 1) We know the general functional group of each given in the option. For alcohol -OH, aldehyde -CHO , ester – COOR , amine R-NH2 and ketone R-CO-R’. So from the given options amine has the only types of compounds do not contain oxygen
2) We know the two complementary strands of DNA hold together by force between the base. There is electronegative element from one DNA stand from the hydrogen bonding the other DNA, so hydrogen bonds forces hold the two complementary strands of DNA together
3) We know amino acid are linked by the -NH-CO- bond and from the protein. We know the linkage between the amino acid that is -NH-CO- called peptide bond. So, amino acids are linked together by peptide bond to form proteins.
4) In stomach there is gastric acid and the contain of the gastric acids are hydrochloric acid, potassium chloride and sodium chloride. So hydrochloric acid is found in stomach acid
5) We know strong acid are the acid which can dissociate completely and its conjugate base is more stable. Strong acid has very low pH, since the high concentration of proton then pH is less. So statements Acids which are concentrated and Acids which dissociate 100% into ions are correct.
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