21. (1 pt) Identify the two classes of nucleic acids. A. ribonucleic acid and de

Question

21. (1 pt) Identify the two classes of nucleic acids. A. ribonucleic acid and deoxyribonucleic acid B. alpha helix and pleated sheet C. dipeptide and tripeptide D. primary and secondary E. globular and fibrous 22. (1 pt.) What are the parts of a nucleic acid? A. sugar and nitrogen base B. sugar and phosphate group C. sugar and phosphorus base D. sugar, phosphate group, and nitrogen base E. phosphate group and nitrogen base 23. (I pt.) The bonds that hold sugars together in polysaccharides are E. ionic bonds A. ether linkages B. peptide bonds C. disulfide linkages D. carbon-carbon covalent bond 24. (I pt.) What is the class of biomolecules that serves as a source of energy, is composed of carbon, hydrogen, and oxygen, and has the general formula C(H.0m A. nucleic acids B. sugars C. celluloses D. carbohydrates E. proteins

Explanation / Answer

21) A) the two nuclic acids are deoxyribonucleic acid and ribonucleic acid

where deoxyribonucleic acid (DNA) monomers are nucleotides which consists of deoxyribose sugar and nitrogen bases like purine (cytosine and thymine) and pyrimidines (adinine or gunaine)

where as RNA consists of monomers like phosphate, ribose sugar and nitrogen bases (Cytosine, uracil, guanine or adenine)

22)D) it consists of sugars (ribose), phosphates, and nitrogen bases as (purines and pyrimidines)

23) it was alwas bonded with glycisidic linkage but not by ionic or disulfide or peptides and may be ether because 1 carbon in sugar will bond with another sugar with the help of oxygen iam not sure about it but other are 100% sure thank you

24) it is carbohydrates

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