Approximately what percentage of the visible light that reaches Earth's producers is converted to chemical energy?
A) 10%
B) 0.1%
C) 1%
D) 0.01%
C
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Each amino acid made during protein biosynthesis first requires a separate biosynthetic pathway to be invoked by a cell
Indicate whether the statement is true or false.
Which statement about amino acids is false?
A) A polypeptide is made up of several amino acids attached by peptide bonds. B) Amino acids are linked by peptide bonds that form between two amino groups. C) The C terminus of a polypeptide chain contains a free carboxylic acid group. D) Each type of amino acid has a unique R group.
Lysosomes are responsible for ________
A) lipid synthesis B) cellular respiration C) digestion of organic matter inside the cell D) protein synthesis
Which of these levels of biological organization includes all of the others in the list:
a. organ b. Molecule c. Cell d. Tissue