Which of the following infectious particles do not have protein in their structure?
A) bacteriophages
B) prions
C) animal viruses
D) viroids
E) both prions and viroids
D
Bloom's Taxonomy: Comprehension
Section: Other Parasitic Particles: Viroids and Prions
Learning Outcome: 13.22
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In Bacteria, sensor kinases that respond to extracellular signals transfer this signal to the cytoplasmic machinery by typically phosphorylating the ________ residues
A) histidine B) serine C) threonine D) tyrosine
Picrophilus has a pH optimum below 1 and can even grow at or near pH 0.
Answer the following statement true (T) or false (F)
Describe the blending theory of heredity and how Mendel's results help to reject this theory
What will be an ideal response?
In the spring before the leaves come out, maple trees are often tapped to collect sap to make syrup. The sugars were stored in the wood of the tree as starch and then released as temperatures rise above freezing in late winter. Which of the following tissues would contain the starch over the winter?
A. xylem B. phloem C. parenchyma tissue D. collenchyma tissue E. roots