Why must lactic acid be removed from muscle cells?
A The lactic acid can poison muscle cells.
B The lactic acid can cause muscle cells to change into fat.
C The lactic acid can cause muscle cells to change into nucleic acids.
D The lactic acid will cause the cytoplasm to become aerobic and very diluted.
A The lactic acid can poison muscle cells.
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Endonucleases and exonucleases are enzymes that can remove nucleotides from a polynucleotide chain. An endonuclease removes nucleotides _______ while an exonuclease removes nucleotides _____________.
A. from the 5' end of the chain; from the 3' end of the chain B. from the 3' end of the chain; from the 5' end of the chain C. internally; from the ends of the chain D. from the ends of the chain; internally
Budding (select all correct choices):
A. is a form of asexual reproduction. B. is found in fungi, plants, and some animals. C. involves an unequal division between a mother and daughter cell or organism. D. leads to a mother cell and a daughter cell that are genetically very different. E. occurs when one organism is divided into pieces called buds.
A new operon is discovered in bacteria. Transcription of the genes in this operon is blocked by the binding of a protein
to DNA sequences upstream of the operon. This is an example of ____ control. a. positive b. negative c. constitutive d. posttranscriptional e. inducible
Which structure of a flower traps pollen?
A) style B) stigma C) ovary D) filament