Transmembrane movement of a substance down a concentration gradient by a membrane protein is called ________
Fill in the blank with correct word.
Answer: passive transport/facilitated transport
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During strenuous exercise, you may notice that your muscles burn. Which of the following statements best explains this phenomenon?
A) Proteins are being digested to provide energy. B) Carbon dioxide is building up in muscle and changing the pH. C) Without oxygen, pyruvate is being converted to lactic acid. D) ADP is accumulating, which produces a burning sensation. E) Pyruvic acid causes muscle pain.
The density of woody vegetation in a savanna is controlled through
A) mean annual temperature. B) mean annual temperature, soil texture, and water-holding capacity. C) mean annual precipitation. D) mean annual precipitation, soil texture, and water-holding capacity.
Haemophilus influenzae type b is a causative agent of meningitis in children.
Answer the following statement true (T) or false (F)
The genetic code is expressed differently in bacterial and archaeal cells than in eukaryotic cells.
Answer the following statement true (T) or false (F)