Which molecule catalyzes covalent bond formation between fragments of DNA.
A. helicase.
B. ligase.
C. polymerase.
D. primase.
E. nuclease.
B. ligase.
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Methane gas (CH4) is an example of a
molecule containing which type of chemical bonds?
a. hydrogen bonds b. double bonds c. ionic bonds d. polar covalent bonds e. nonpolar covalent bonds
Which of the following is the strongest evidence for
the idea that present-day eukaryotic aerobes are the descendants of the successful symbiotic association of anaerobes and aerobes? a. Mitochondria can produce ATP. b. A mitochondrion can survive indefinitely when removed from a eukaryotic cell. c. A mitochondrion has its own set of DNA molecules. d. Fossilized mitochondria are older than the oldest fossilized eukaryotes. e. All eukaryotic cells have mitochondria.
Lack of iodine will lead to the development of
a. diabetes insipidus. b. diabetes mellitus. c. a simple goiter. d. acromegaly. e. Graves disease.
Translocations may be pericentric or paracentric
Indicate whether the statement is true or false