Zn + 2H+ = Zn2+ + H2 is an example of a redox reaction. What is happening to the hydrogen ions during this reaction, in which a bond is formed between the two H atoms?
A. Oxidation reaction and acceptance of an electron.
B. Reduction reaction and acceptance of an electron.
C. Reduction reaction and donation of an electron.
D. Oxidation reaction and donation of an electron.
B. Reduction reaction and acceptance of an electron.
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In Bacteria, a chromosome can be distinguished from a plasmid, because a chromosome is a genetic element that
A) is circular. B) is linear. C) encodes for essential functional genes. D) replicates via a bidirectional fork.
Quality control is set up to determine the validity of cetrimide agar. Which two organisms should be used?
a. B. bronchiseptica and Cupriavidus pau-culus b. A. denitrificans and Alcaligenes faecalis c. Achromobacter piechaudii and B. bron-chiseptica d. Centers for Disease Control and Preven-tion (CDC) Alcaligenes-like group 1 and C. pauculus
Differentiate between Parazoa and Eumetazoa.
A. Parazoa have only one kind of cell during their life cycle whereas Eumetazoa have many kinds of cells throughout their life cycle. B. The various cells types of Parazoa do not form permanent associations into tissues during their life cycle, whereas Eumetazoa possess true, stable tissues. C. Parazoans are only haploid during their life cycle, whereas eumetazoans are diploid with haploid sex cells at various stages of their life cycle. D. Parazoans invert during their development whereas eumetazoans do not invert at any time during their life cycle. E. Parazoans have mobile gametes while eumetazoans do not.
Two parents with widow's peak and short fingers have a child with a continuous hairline and long fingers. What are the genotypes of the two parents? (W = widow's peak; S = short fingers)
Select one: a. WWSS × wwss b. wwss × WWSS c. WWss × WWss d. WwSs × WwSs e. WwSs × wwss