Methylation and acetylation are common changes made to histone H3, and the specific combination of these changes is sometimes referred to as the "histone code." Which of the following patterns will probably lead to gene silencing?
(a) lysine 9 methylation
(b) lysine 4 methylation and lysine 9 acetylation
(c) lysine 14 acetylation
(d) lysine 9 acetylation and lysine 14 acetylation
(a)
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When your mother is mad at you, she likes to remind you that she spent 48 hours in painful labor to bring you into the world! Specifically, she means that she spent a long time in the ________ stage of labor
A) expulsion B) dilation C) third trimester D) placental
During a workout session, you may begin to experience a burning sensation in a muscle group that you are targeting with your choice of exercises. This is most likely due to anaerobic metabolism in that muscle, generating ________
Fill in the blank(s) with correct word
When comparing members of archaea with bacteria
A. archaea were the first organisms and were followed by bacteria. B. the chemical nature of the cell wall of archaea and bacteria is identical and shows their early relationship. C. bacteria are not very diverse and are limited in distribution while archaea are far more diverse and found everywhere. D. the archaea and bacteria are cases of reduction in traits and are both derived from early eukarya. E. None of the choices are true.
With almost no exceptions, the nitrogen fixers are
A. insects. B. mammals. C. green plants. D. prokaryotes. E. beans.