Cellulose is ____
a. a polysaccharide found in cell walls of plants
b. a component of cell membranes
c. an oligosaccharide found in animals
d. formed by hydrolysis of monosaccharides
e. a component of invertebrate exoskeletons
ANSWER: a
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Which of the following junctions are important for cell signaling?
A. adherins junctions B. gap junctions C. plasmodesmata D. desmosomes E. All of the choices are correct.
Why are model organisms used to test hypotheses?
A) The hypotheses are likely to apply only to the model organism. B) The hypotheses are potentially too dangerous to perform on human subjects. C) Human subjects have already been tested. D) The hypotheses have results that are always applicable to humans.
A single carbon atom can form a maximum of ________ covalent bond(s)
A) 0 B) 1 C) 2 D) 4
Cytogenetics is
A. the process by which the haploid cells are produced from a cell that was originally diploid. B. a photographic representation of chromosome. C. the field of genetics that involves the microscopic examination of the chromosomes and cell division. D. the process in which the two nuclei are segregated into separate daughter cells. E. the sorting process to divide one cell nucleus into two nuclei.