Question

question 11 (1 point)
which statement about cellulose is true?
it is made of repeating glucose molecules that are flipped every other molecule.
it is largely indigestible by the human body.
it is a polymer made of many repeating monomers joined together.
all the statements are true.
question 12 (1 point)
rna and dna differ from each other in which way?
dna has ribose sugar but rna does not.
dna has thymine but rna does not.
dna contains nucleotides by rna does not.
rna has cytosine but dna does not.

Explanation:

Question 11

• Cellulose is a polysaccharide (polymer) composed of repeating glucose monomers. The glucose units in cellulose are linked by β - 1,4 - glycosidic bonds, and every other glucose molecule is "flipped" (in a β - configuration).
• Humans lack the enzyme cellulase, so cellulose is largely indigestible by the human body.
• Since all the individual statements (about its structure as a polymer with flipped glucose units and indigestibility) are correct, the statement "All the statements are true" holds.

• DNA has deoxyribose sugar, while RNA has ribose sugar. So the statement "DNA has ribose sugar but RNA does not" is false.
• Both DNA and RNA are made of nucleotides. So the statement "DNA contains nucleotides by RNA does not" is false.
• Both DNA and RNA have cytosine. So the statement "RNA has cytosine but DNA does not" is false.
• DNA has thymine (\(T\)), and RNA has uracil (\(U\)) instead of thymine.

Answer:

All the statements are true.

Question 12