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
serious [3.7K]
2 years ago
15

The main role of the ________ is to increase the binding ability of RNA polymerase to the lac operon promoter region.

Biology
1 answer:
Anna11 [10]2 years ago
4 0

Answer:

catabolite activator protein (CAP)

Explanation:

Catabolite activator protein (CAP) is a homodimeric transcriptional activator required for transcription initiation of catabolite-sensitive genes in <em>Escherichia coli</em>. CAP contains a ligand-binding domain at its N-terminus and a DNA-binding domain at its C-terminus. CAP activates transcription by binding at target DNA sites on promoter sequences, thereby enhancing the ability of the RNA polymerase to bind and initiate transcription. CAP binds cyclic AMP (cAMP) to increase CAP’s affinity to DNA and thus activates the transcription of genes for catabolism, such as the lactose (lac) operon genes (the lac operon is a set of genes that encode for enzymes taking part in lactose metabolism).

You might be interested in
Some proteins that are on the surface of mammalian cells contain carbohydrates. these proteins are synthesized by _______ and th
goldenfox [79]
Genarte cells extended engery blood
7 0
3 years ago
Assuming that the average protein in E. coli consists of a chain of 380 amino acids, calculate the maximum number of proteins th
Afina-wow [57]

Answer:

4210.5 proteins

Explanation:

(a)The amount of nucleotide pairs in the DNA molecule calculated using

=molecular weight of DNA/molecular weight of a single pair

molecular weight of DNA

= 3.1 × 10^9g/mol

molecular weight of a single pair

= 0.66 ×10^3g/mol

= (3.1 × 10^9g/mol)/(0.66 × 10^3g/mol)

= 4.7 10^6pairs

Lets, Multiply the number of pairs with the length per pair

Take, length per pair = 0.34 nm/pair

= (4.7 × 10^6pairs)(0.34 nm/pair)

= 1.6 × 10^6nm

= 1.6 mm

= (approx 2mm or 0.002 mm).

Therefore,

the DNA is

(1.6 mm)/(0.002 mm)

= 800

The DNA is 800 times times longer than the cell.

This indivates Tat DNA must be tightly coiled to fit into the cell.

(b) the amount of DNA molecule nucleotide pairs has given

= 4.7 × 10^6 nucleotide pairs,

From solution (a), there must be one-third this number of triplet codons

= (4.7 × 10^6)/3

= 1.6 × 10^6codons

If an individual protein has an average of 380 amino acids, each needs a codon,

the number of proteins that can be coded by E. coli DNA

= (1.6 × 10^6codons) × (1 amino acid/codon)

---------------------------------------------

(380 amino acids/protein)

= 4210.5 proteins

________________________

Here is the complete question

The genetic information contained in DNA consists of a linear sequence of coding units known as codons. Each codon consists of three adjacent DNA nucleotides that corresponto a single amino acid in a protien.

The E.coli DNA molecule contains 4.70 x 10^6 base pairs. Determine the number of codons that can be present.

Assuming that the average protein in E.coli consists of a chain of 400 amino acids, calculate the maximum number of protiens that can be coded by an E.coli DNA molecule

7 0
3 years ago
If you are good with science please help me!!! 15p
Elena-2011 [213]

help with what? there is nothing to answer



6 0
3 years ago
A red flower and a flower with red and white spots are crossed. What is the percentage of them having an all red flower
Lynna [10]

Answer:

the answer is 2 percent

7 0
2 years ago
There are more primary producers than what
Wewaii [24]

Answer:

Primary Consumers.

Explanation:

7 0
2 years ago
Other questions:
  • Describe how and why organisms are hierarchically classified and based on evolutionary relationships
    14·1 answer
  • Hominins are committed to bipedalism and cannot locomote efficiently in any other way, in other words
    13·1 answer
  • Which property of water allows blood to aid in the transportation of nutrients and gases throughout the body?
    12·1 answer
  • Could someone please help me with this ASAP thank you!
    6·1 answer
  • How can a natural event such as a volcanic eruption affect biodiversity? Erupting volcanoes emit gases such as sulfur dioxide in
    14·2 answers
  • Photosynthesis is to chloroplasts as energy productionis to
    5·1 answer
  • Which of the following statements is a false or incorrect statement?
    7·1 answer
  • When doing medical research with human subjects, which four limitations are unavoidable?
    5·1 answer
  • What is the average for the following set of measurements?
    10·1 answer
  • 4. Other than mutations, what is another cause of punctuated equilibrium?​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!