Name two consensus sequences or modular DNA sequences that may be found upstream from coding regions of some eukaryotic genes
What will be an ideal response?
TATA and CAAT sequences (boxes)
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Chromosomes and genes share all of the following characteristics except that
A) they are both present in pairs in all diploid cells. B) they both undergo segregation during meiosis. C) their copy numbers in the cell decrease after meiosis, and increase during fertilization. D) they are both copied during the S phase of the cell cycle. E) they both pair up with their homologues during prophase of mitosis.
A difference between an acid and a base is that
A. acids are harmful and bases are not. B. acids release hydroxide ions and bases release hydrogen ions. C. acids have a high pH value and bases have a low pH value. D. acids have a low pH value and bases have a high pH value.
Which statement is true?
1.Both the parasympathetic and sympathetic nervous systems send nerves to all organs. 2.The sympathetic nervous system that supplies an organ will also provide parasympathetic nerves to it. 3.The sympathetic branch can have either excitatory or inhibitory effects depending on effects from the environment. 4.The sympathetic branch of the autonomic system usually speeds up the activities of the body. 5.The parasympathetic system usually speeds up the activities of the body.
When tissue lining a blood vessel is damaged, the first thing that happens is ________
A) erythrocytes release fibrin B) leukocytes multiply C) platelets convert fibrinogen to fibrin D) platelets adhere to the damaged tissue