What is the usual pH of stomach acids?

a. 2
b. 7
c. 10
d. 12


Answer: a. 2

Biology & Microbiology

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Due to the relationship between the rate of enzyme catalysis and temperature, organisms living in boiling hot springs are also rapid growers with fast doubling times

Indicate whether the statement is true or false.

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Some archaeal cells lack a cell wall.

Answer the following statement true (T) or false (F)

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Which of the following characteristics of light is most commonly used for defining light as a portion of the electromagnetic spectrum?

a. the fact that all living organisms can detect it b. the fact that plants can detect it c. the fact that humans can detect it with their eyes d. the fact that non-human animals can detect it with their eyes

Biology & Microbiology

The role of the CDR in a TCR is to

a. anchor the TCR in the cytoplasmic membrane. b. link the alpha and beta chains. c. bind the MHC–peptide complex. d. do all of the above.

Biology & Microbiology