In an ecosystem
A. both energy and nutrients cycle.
B. energy flows and nutrients cycle.
C. energy cycles and nutrients flow.
D. both energy and nutrients flow.
E. energy is contained with nutrient cycles.
B. energy flows and nutrients cycle.
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The ribosomes
A. move along the tRNA in a 3'-5' direction. B. move along the mRNA in a 5'-3' direction. C. move along the DNA in a 5'-3' direction. D. provide a platform that brings the amino acids into a favorable position for joining. E. move along the mRNA in a 5'-3' direction AND provide a platform that brings the amino acids into a favorable position for joining.
Which one of the following actions of humans has not contributed to the worldwide reduction in biodiversity?
A) pollution B) growth of cities C) logging D) clear-cutting of rain forests E) biomass energy sources
Glycolysis occurs in the ________; the Krebs (TCA) cycle occurs in the ______ of eukaryotes and the ______ of prokaryotes.
a) cytoplasm, mitochondria, mitochondria b) cytoplasm, mitochondria, cytoplasm c) cytoplasm, photosynthesis, cytoplasm d) mitochondria, cytoplasm, mitochondria
The only effective way to store bacterial cultures for short periods of time is to arrest their metabolism by freezing.
Answer the following statement true (T) or false (F)