Botulism and tetanus are caused by bacterial endospores commonly found in the soil
Indicate whether the statement is true or false
TRUE
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Which of the following molecules is not considered a porphyrin?
A. Hemoglobin B. Peptidoglycan C. Vitamin B12 D. Chlorophyll
An electrochemical gradient arises from an ions combined
a. concentration gradient and electrical charge b. protein pumps and electrical charge c. concentration gradient transporters
One reason that water is able to form unbroken columns is because water molecules are cohesive
____________________ Indicate whether the statement is true or false.
Which of the following statements about methyl-directed mismatch repair systems is FALSE?
A. Methyl-directed mismatch repair systems are most often used to correct pyrimidine dimers. B. Methyl-directed mismatch repair systems require exonucleases. C. Methyl-directed mismatch repair systems require the concerted actions of several proteins. D. Methyl-directed mismatch repair systems recognize incorrectly matched base pairs in the DNA. E. Methyl-directed mismatch repair systems exist in all species.