Antiparallelism means that
A) the two strands of a DNA molecule run in opposite directions.
B) the DNA double helix twists first one way, then the other.
C) the DNA bases are sometimes on the outside of the molecule.
D) the DNA molecule cannot dissolve in water.
A) the two strands of a DNA molecule run in opposite directions.
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Which of the following is not a function of membranes?
A) define cell boundaries B) compartmentalization C) information storage D) regulation of transport E) cell-cell communication
Members of the ____ Ecdysozoan phylum, commonly called roundworms, are so plentiful in soil and other places that
they may be the most abundant animals on Earth.,
a. Arthropoda b. Onychophora c. Nemertea d. Annelida e. Nematoda
Which of the following traits is unique to deuterostome animals?
A. A coelom B. Bilateral symmetry C. Mouth formation on the end of embryos opposite the blastopore D. A nervous system
What is the function of the lacY gene in the lac operon?
What will be an ideal response?