In light of the role of calcium ions in muscle contraction, what happens to a person who is deficient in dietary calcium?
What will be an ideal response?
Muscle weakness occurs due to an inability to remove tropomyosin from myosin binding sites on the actin molecules. As a result, myosin cannot bind to actin molecules and the sarcomere will not shorten.
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Imagine you have discovered a new species of bacteria. To begin your investigation of this organism, you run an assay on the total nucleotide content of the bacterial cells
If the cytosine content of DNA from the bacterial cells is 17%, what is the adenine content? A. 17% B. 34% C. 66% D. 33% E. It is impossible to calculate this number for eukaryotes.
Which general term is used to group various biological and behavioral properties of organisms that act to prevent or reduce interbreeding?
A) phyletic evolution B) inbreeding C) reproductive isolating mechanisms D) genetic divergence E) allopatric speciation
Washing dishes in the dishwasher with detergent and hot water is a ________ process
A) antiseptic B) disinfecting C) sterilizing D) sanitizing E) degerming
The earliest cells were probably autotrophs that made food by photosynthesis
a. true b. false