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
GrogVix [38]
3 years ago
15

A. E. coli is able to use foods other than glucose in the absence of available glucose, because falling levels of glucose cause

an increase of B) activator protein
A) operator
B) promotor
C) structural gene
D) CAMP
Biology
1 answer:
Gnom [1K]3 years ago
3 0

Answer: D) cAMP

Explanation:

In the absence of glucose cell can make use of other sources of carbohydrates such as lactose. In E. Coli and other bacteria utilization of lactose depends on the availability of cAMP. Bacteria accumulate cAMP only when starved. When glucose is exhausted, cAMP is available in plenty.

cAMP is necessary for the gene expression because it binds catabolite repressor protein (CAP) to form CAP-cAMP complex. CAP is a lac repressor the binds to the operator site of the lac operon preventing RNAP From binding to the promoter.

RNA polymerase can bind to the promoter site only when CAP-cAMP formed

You might be interested in
Emily is studying how a person's breathing rate is affected by aerobic and anaerobic exercise. To do this, she measures the brea
astraxan [27]
Im pretty sure the answer is a
8 0
3 years ago
The muscular system helps maintain body temperature. Explain why humans shiver in the cold. Be sure to discuss the process of ce
docker41 [41]
The muscular system contributes to maintaining homeostasis by working with other body systems to regulate body temperature and dilate or constrict blood vessels close to the skin's surface, according to OpenCurriculum. The muscular, nervous, cardiovascular, endocrine and integumentary systems work together to cause sweating and shivering in the body, which contribute to homeostasis.
3 0
3 years ago
DNA within the cell is wrapped around nucleosomes to form chromatin. When chromatin is in the form of a 30 nm fibril, how many c
vodomira [7]

Answer:

The correct answer is option b. "20 H1, 40 H2A".

Explanation:

Chromatin is a complex that protects and condenses the genetic material comprised of DNA and proteins. When chromatin is in the form of a 30 nm fibril, nucleosomes have a regular positioning along the DNA. This means that each nucleosome is associated with a single H1 molecule. Therefore a chromatin containing 20 nucleosomes will have 20 copies of H1 and 40 copies of H2A, because each nucleosome has 2 copies of the core histone H2A.

8 0
3 years ago
In the spinal cord, gray matter is functionally organized into _________ while white matter is organized into _________.
NemiM [27]

Answer:

Horns and columns.

Explanation:

The spinal cord is the important component of the central nervous system. The spinal cord consists of the nerves of the body and control the reflex actions of the body.

Spinal cord consist of white matter and grey matter. The motor and sensory axons are present on white matter. The white matter covers the grey matter and arranged into the different columns. The grey lies inside the white matter and consists of neuronal cell bodies. The grey matter is completely organised in the horns.

Thus, the answer is horns and columns.

3 0
3 years ago
Read 2 more answers
Three reasons why do you think women in today's society could be more obese than men in South Africa​
bezimeni [28]

Answer:

Three Reasons

Explanation:

1, due to the genome. By birth, there is a biologically higher percentage of body fat in women.

2, unemployment. As normally in a South African household, it is the man that goes out to work while the women stay at home. loss of mobility means the accumulation of fats.

3, Males' major sex hormone is testosterone, and females have high levels of estrogen and progesterone in their blood. Females build up fat more easily than males.

8 0
2 years ago
Other questions:
  • Which of the following best describes how the cells formed during mitosis compare to the cells formed during meiosis? Mitosis pr
    6·2 answers
  • The minimum intensity of physical stimulation required to produce any sensation at all in a person is the ________.
    9·1 answer
  • In a certain cat, long whiskers (W) are dominant and short whiskers (w) are recessive. Two cats have genotypes Ww and ww. If the
    11·2 answers
  • The plasma membrane is composed of a phospholipid bilayer with embedded proteins. What is one of the functions of the embedded p
    12·2 answers
  • Why does diffusion not require any energy?
    15·1 answer
  • Identify the structures of the female reproductive system using the drop-down menus. This structure is also called the birth can
    11·2 answers
  • At a mid-ocean ridge, a crack forms along the oceanic crust causing __________.
    10·1 answer
  • What are the 3 stages of aerobic respiration?
    11·1 answer
  • CAN SOMEONE PLEASEEE HELP ME WITH THIS SCIENCE QUESTION THANK YOU !!​
    9·1 answer
  • Weathering breaks rock into sediments. Water, wind, and moving ice carry away the
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!