A sarcomere shortens when _____
a. thick filaments shorten c. both thick and thin filaments shorten
b. thin filaments shorten d. none of these
D
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A microbiologist is studying the growth of a particular strain of bacteria to determine when it will transition from exponential growth to stationary phase and from stationary phase to death phase. Which of the following methods of measuring microbial growth would be best for this purpose?
A. Determining dry weight of microbes B. Viable plate count C. Turbidimetric measurements using a spectrophotometer D. Direct microscopic count
How can a replication error become a permanent mutation?
What will be an ideal response?
Choose the statement that correctly describes this equation:Hb + O2 ? HbO2
A. The O2 indicates that hemoglobin can bind up to two oxygen molecules. B. Hb stands for mercury, an element that can interfere with the transport of oxygen in the blood. C. Because of hemoglobin's high affinity for oxygen, when oxygen is present the equation is always in the bound state, on the right of the arrows. D. The double arrow indicates that the binding is reversible.
Haploid nuclei
a. contain one set of chromosomes. b. contain two sets of chromosomes. c. contain half a set of chromosomes. d. are found in the cytosol of eukaryotic organisms.