Nucleotides are joined together in a phosphodiester bond by
A. hydrolysis.
B. oxidation-reduction.
C. combustion.
D. dehydration synthesis.
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One unifying property of lipids is
A. they have double bonds between carbon.
B. they are steroids and are used for communication.
C. they are hydrophobic and nonpolar.
D. they are hydrophillic and polar.
Which of the following is a monosaccharide?
A. glutamic acid
B. tyrosine
C. glucose
D. adenosine
How can certain animals extract energy and nutrients from cellulose?
A. cellulose is made from alpha glucose monomers and they have they enzyme to break it down
B. cellulose is made from beta glucose monomers and they have a symbiotic relationship with bacteria to break it down
C. cellulose is not digestible for an organism, it is only insoluble fiber
D. cellulose is a protein made up of amino acids which are used to make proteins for the cell
The graph above shows the different elements percentages found in the human body. What element is represented by the letter B?
A. carbon
B. nitrogen
C. hydrogen
D. oxygen
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