What happens to the lactic acid created during fermentation in human muscle cells?
A) It is directly converted into ATP.
B) It donates a phosphate to ADP to recharge ATP.
C) It goes to the liver, where it's converted into pyruvic acid.
D) It joins with electrons and hydrogen ions to form H2O.
C
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The enzyme that inserts the correct bases in a growing nucleotide chain in a replicating DNA molecule is
A) RNA polymerase. B) DNA ligase. C) DNA polymerase. D) helicase.
In a class field trip, you scrape what looks like an organism off of a stream rock. Through the semester, with chemical analysis and electron microscopes, you determine that the cell has DNA, RNA, ribosomes, a cell membrane, and cytoplasm. This helps you determine that
A. this is an unusual plant that you collected from the stream. B. this organism you collected is in the Eukarya domain. C. this organism you collected is in the Bacteria domain. D. this organism you collected is in the Archaea domain. E. this is an organism with cells having common features with all life.
The amnion is to the amniotic fluid as the allantois is to the
A. blood cell precursors. B. umbilical blood vessels. C. chorionic villi. D. yolk. E. amniotic cavity.
If a parent cell has a diploid number of 18 chromosomes before mitosis, how many chromosomes will the daughter cells have?
a. 9 b. 36 c. 18 d. 64 e. 27