1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Arturiano [62]
3 years ago
8

"Housekeeping genes" in bacteria are commonly expressed constitutively, but not all

Biology
1 answer:
KiRa [710]3 years ago
8 0

Answer:

B) their promoters have different affinities for RNA polymerase holoenzyme.

Explanation:

The housekeeping genes are the one whose products are involved in the vital metabolic pathways. So, these genes are mostly expressed at a constant level in the cells. However, the protein products of housekeeping genes exhibit variations in their cellular concentration.

The variation in the expression of housekeeping genes is regulated by the interaction between RNA polymerase holoenzyme and promoter.

The variations in the promoter sequences of these genes regulate the rate of the initiation of transcription by affecting the interaction between RNA polymerase-promoters. Certain promoter sequences facilitate the binding of RNA polymerase more than the other ones. This differential interaction regulates the rate of transcription initiation and accounts for variable cellular concentration of products of housekeeping genes.

You might be interested in
Which respiratory disease in which sufferers are often called "pink puffers," is characterized by enlarged alveoli, lung inflamm
vitfil [10]
The correct answer is emphysema.
This respiratory disease occurs when alveoli get enlarged, and thus cause chronic lung inflammation and later on lung fibrosis as well. This person then finds it extremely hard to breathe properly, as airways tend to collapse during expiration.
7 0
3 years ago
Put the fats in order from the one that contains the greatest percentage of saturated fatty acids (1) to the one that contains t
olganol [36]

Answer:coconut oil, butter, palm oil, olive oil, canola oil.

Explanation: .

A saturated fat one whose fatty acid chains have all or predominantly single bonds. A fat is made of two kinds of smaller molecules which are glycerol and fatty acids. Fats are made of long chains of carbon (C) atoms while some carbon atoms are linked by single bonds (-C-C-) bonds others are linked by double bonds (-C=C-). These Double bonds will react with hydrogen to form single bonds causing them to be SATURATED, because when the second bond is broken, each half of the bond is then saturated with a hydrogen atom.

In terms of saturated fats acids composition by percentage according to ChartsBin statistics collector team 2011, Fat Composition in different Cooking Oils, ChartsBin.com, palm oil is 14.192, coconut oil is 91.92 canola is 7.46,palm oil 51.57, butter 65%-68%.Here you can see that the order of saturated fats from the highest gives- Coconut,butter, palm oil,olive oil and Canola as the last

6 0
3 years ago
When Charles Darwin set sail on the HMS Beagle, what did he and most of his contemporary scientists think about the origin of sp
Rama09 [41]

Answer:

Most scientists, including Darwin, thought each species was specially created by God in its present form and did not change over time.

Explanation:

3 0
3 years ago
What is work?
likoan [24]
I believe it’s A. Not sure though
4 0
3 years ago
Read 2 more answers
Which type of RNA interacts with nuclear proteins to form a ribonucleoprotein complex responsible for intron removal? a) snRNA b
Gennadij [26K]

Answer:

a) snRNA

Explanation:

The association of small nuclear RNA  (snRNA) and some specific proteins forms small nuclear ribonucleoprotein complexes.  Some complexes are spliceosomes,  molecular machines -made up of a snRNA and about 80 proteins- that remove introns from pre-mRNAs via successive phosphoryl transfer reactions.

4 0
4 years ago
Other questions:
  • During exercise, muscle cells release the protein ________ which can cause brite/beige adipocyte formation:
    9·1 answer
  • What is the difference between longitudinal cross transverse and horizontal cuts?
    14·1 answer
  • The discovery of ______ is used as support for the motor theory of speech perception.
    10·1 answer
  • One role of the skeletal system is to produce _____.
    10·2 answers
  • Saved
    11·1 answer
  • What is produced in transcription?
    7·1 answer
  • How is DNA a piece of evidence for evolution
    8·1 answer
  • What education do veterinarians need to complete before working
    9·1 answer
  • At the end of meiosis ll, each of the haploid sex cells had only half the number of chromosomes as the original diploid cell. Wh
    10·1 answer
  • Question 13 (1 point) Which of the following processes add methane (CH4) to the atmosphere in the carbon cycle?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!