Answer:
Option (A) and (C).
Explanation:
Gene regulatory mechanism are important for the regulation of the transcription and proper expression of genes. Different regulatory mechanisms are present in prokaryotes and eukaryotes.
The prokaryotes do not require the multiple general transcription factors where as the eukaryotes have different transcription factors like TFIID, TFIIH and TFIIA. The DNA is packed around the histone protein that form chromatin in eukaryotes. The chromatin packaging includes methylation, ribosylation with the help of enhancers and silencors. The chromatin is absent in case of prokaryotes.
Thus, the correct answer is Option (A) and (C).
Cheese is also an excellent source of protein!
Answer:
Housekeeping genes may be defined as the genes that are constitutive genes important for the cellular functioning of the organism. The expression of housekeeping gene may or may not vary.
Some housekeeping genes are not expressed at same level because the housekeeping genes also have different promoters. The different promoters have different affinity to interact with the holoenzyme of RNA polymerase.
Answer:
1 Q) Which of the following best describes an ecosystem?
<u>4) An entire rainforest, including all biotic and abiotic factors</u>
2 Q) Which of the following happened after wolves were removed from Yellowstone's ecosystem?
<u>2) The elk overgrazed the habitat vegetation of other species</u>
.3 Q) Which features are used to describe a biome?
<u>1) Climate, wildlife, and </u><u>vegetation</u><u>4 </u>
Q) Which statement is correct about biomes?
<u> </u>
<u>1) They represent large geographic </u><u>areas</u>
5 Q) Which of the following is the largest biome on earth by area?
<u>)</u><u>3</u><u> Temperate Grassland</u>
From what i learned, it was thought to be CFCs (chlorofluorocarbons), so aerosol sprays i guess