★ Biology Quiz
the action of ptyalin enzyme stops in the stomach; due to the……
A. decrease in the amount of the enzyme
B. change of all carbohydrates into maltose sugar
C. change in the pH of the medium
D. change of the temperature
Select your answer:
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Anatomy and Histology › ViewWhich part of the human skeleton protects the brain and supports facial structure?
A. Skull
B. Pectoral girdle
C. Vertebral column
D. Pelvic girdle
DNA Replication › View
Match he nucleotide with its complementary nucleotide. (DNA to DNA).
Cytosine-
_
A. Thymine
B. Guanine
C. Adenine