The two polynucleotide chains in a DNA molecule are attached to each other by
A) covalent bonds between carbon atoms.
B) covalent bonds between phosphates and sugars.
C) peptide bonds between amino acids.
D) hydrogen bonds between bases.
E) ionic bonds between "R" groups in amino acids.
D
Biology & Microbiology
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Abscission of fruits and leaves is controlled by
a. abscisic acid. b. ethylene. c. gibberellin. d. auxin. e. cytokinin
Biology & Microbiology
Which of the following do carrier proteins often transport?
a. proteins b. steroid hormones c. H2O d. glucose and amino acids
Biology & Microbiology
Which of the following can cause evolutionary change in a small population?
A) Homozygous individuals B) Lack of mutations C) Genetic drift D) Lack of gene flow E) All recessive alleles
Biology & Microbiology
Complex carbohydrates that are digestible are known as ________
Fill in the blank(s) with correct word
Biology & Microbiology