The movement of molecules across a membrane from an area of lower concentration to an area of higher concentration with the expenditure of energy is called ________.
A. facilitated diffusion
B. active transport
C. osmosis
D. passive diffusion
Answer: B
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Which statement about the genetic code is false?
A. There is no punctuation or spacing between codons. B. Nucleotides are always read in groups of three. C. Every codon codes for one amino acid. D. Some amino acids are specified by more than one codon. E. The genetic code is almost universal, but not quite.
A concerned citizen who suspects that a bioterrorism incident has occurred or will occur should contact 911.
Answer the following statement true (T) or false (F)
All virus particles (virions) have a
A. A genome surrounded by proteins B. Ribosomes and nuclei C. A genome surrounded by cytoplasm but no organelles D. Nuclei and mitochondria E. Golgi and a genome
Methanogens play an important role in sewage treatment.
Answer the following statement true (T) or false (F)