Which is true of carbohydrates?
A. They may be part of the structure of bacteria.
B. They may serve as a source of food.
C.
They contain carbon, hydrogen, and oxygen in a 1:2:1 ratio.
D. They may be bonded to proteins to form glycoproteins.
E. All of the choices are correct.
E
You might also like to view...
The Pribnow box of E. coli
A. is centered approximately 10 bp upstream of the start site of transcription. B. is centered between 7 and 13 bp upstream of the start codon. C. is located at the site of addition of poly (A) in eukaryotic mRNAs. D. is centered approximately 35 bp upstream of the start site of transcription.
It is accurate to say that neural transmission across nearly all mammalian synaptic clefts is the result of
A. neural impulses involving the flow of K+ and Na+ across the cleft. B. neural impulses traveling across the gap as electrical currents. C. neural impulses causing the release of chemicals that diffuse across the cleft. D. neural impulses traveling across the cleft in both directions. E. the calcium within the axons and dendrites of nerves adjacent to a synapse acting as the neurotransmitter.
Many kinds of cactus and other desert plants, such as a Euphorbia, are remarkably similar in that they have fleshy plant bodies and spines. Their flower structures, however, show that they are not related. The process considered to be responsible for their similarity in structure is
A. convergent evolution. B. divergent evolution. C. adaptive radiation. D. speciation by polyploidy.
A parasitic protist that presents a major health problem to backpackers and hikers if they drink unfiltered stream or lake water is
A) Didinium. B) Giardia. C) Plasmodium. D) Trypanosoma. E) Pfiesteria.