Eukaryotic repression generally occurs via physical blockage of the promoter
Indicate whether the statement is true or false
FALSE
Explanation: In eukaryotes, repressors generally interfere with activators, preventing them from initiating transcription.
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Gram-positive bacteria such as Propionibacterium acnes limit the growth of gram-negative bacteria and some fungi on the human skin by converting secreted ________ to compounds with antimicrobial activity.
A. urea B. lipids C. organic acids D. salts
A drug, colchicine, can be added to cells in culture and it stops the polymerization of microtubules. What effect would this have on mitosis?
A. It would slow or block mitosis by interfering with the spindle apparatus function. B. It would speed up mitosis by increasing the rate of DNA replication. C. It would speed up mitosis by increasing the elongation rate of the dividing cell. D. It would slow or block mitosis by preventing DNA replication.
Which of the following statements is FALSE?
A) DNA polymerase joins nucleotides in one direction only. B) The leading strand of DNA is made continuously. C) The lagging strand of DNA is started by an RNA primer. D) DNA replication proceeds in one direction around the bacterial chromosome. E) Multiple replication forks are possible on a bacterial chromosome.
When a sodium atom and a chlorine atom interact to complete their valence shells
A. they form 1 polar covalent bond B,. an electron is transferred from sodium to chlorine, turning the sodium atom into an anion and the chlorine atom into a cation and allowing the two atoms to form an ionic bond C. an electron is transferred from sodium to chlorine, turning the sodium atom into a cation and the chlorine atom into an anion and allowing the two atoms to form an ionic bond D. they form 2 polar covalent bonds