A scientist wants to study histones. Histones are:
A. proteins that double-stranded DNA molecules wrap around in prokaryotes and eukaryotes.
B. proteins that double-stranded DNA molecules wrap around in eukaryotes.
C. proteins that required for the activity of Cdk enzymes.
D. proteins that regulate checkpoints in the mitotic cell cycle.
E. proteins that serve as the spindle fiber to pull sister chromatids apart during anaphase.
Answer: B
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Inflammation ____
a. is triggered by activated complement b. is a specific immune response c. results in redness due to decreased blood flow d. results in swelling due to the loss of water from damaged tissue e. is caused by fever
Which trait cannot possibly be explained by convergent evolution?
How do mitosis and meiosis differ from each other?
A) The goal of mitosis is to produce cells that are genetically identical to the original parent cell; the goal of meiosis is to produce cells that contain twice the number of chromosomes as the original parent cell. B) The cells formed by mitosis are diploid; the cells formed by meiosis are haploid. C) Mitosis results in the production of gametes; meiosis results in the production of cells, which are used for the organism's growth and replacement of damaged cells. D) Synapsis and crossing over occur in mitosis to ensure new combinations of genetic material; synapsis and crossing over do not occur in meiosis.
The TCA cycle is located in the ________ of bacteria, and in the ________ of eukaryotes.
A. plasma membrane; inner mitochondrial membrane B. plasma membrane; mitochondrial matrix C. cytoplasm; mitochondrial matrix D. cytoplasm; inner mitochondrial membrane