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
Virty [35]
3 years ago
12

In the absence of tryptophan, what happens to the genes within the trp operon? a. The regulator without tryptophan-binding preve

nts the genes from being transcribed. b. The regulator falls off the operator and structural genes get transcribed. c. Lack of tryptophan increases the level of cAMP high, which leads to activation of CAP protein and gene expression. d. The active repressor binds to the operator and genes do not get transcribed. e. The active activator binds to the operator and transcription of structural gene takes place.
Biology
1 answer:
STatiana [176]3 years ago
7 0

Answer:

The correct answer is b  The regulator gene falls off the operator and the structural genes get transcribed.

Explanation:

Tryptophan operon contain3 regulatory genes and 5 structural genes.when adequate amount of tryptophan is present at that time the tryptophan binds to the repressor molecule encoded by tryp R gene.Thus Tryptophan act as co repressor .The repressor molecule bound to tryptophan interacts with operator region resulting in blocking the expression of structural genes.

 But when tryptophan is absent at that time repressor molecule cannot function.As a result the repressor molecule fall off from the operator and structural genes get transcribed.

You might be interested in
_____________ are fat-soluble signal molecules that are derived from cholesterol.
zepelin [54]
The answer that fits the blank provided above is STEROIDS. Steroids are fat-soluble signal molecules. This is one of the derivative compounds of cholesterol along with Vitamin D and bile salts. All steroid hormones are considered as a derivative of cholesterol. The answer for this would be option D.
6 0
3 years ago
Read 2 more answers
Plants use carbon dioxide, nutrients in the water and sunlight to produce _________.
grandymaker [24]
The answer could be any of the following:
* energy
* sugar
* carbohydrates
* (possibly even) food. 
7 0
3 years ago
Gİ EXERCISE
patriot [66]

Answer:

1) To form a multicellular organism, a zygote must divide into 16 cells which produces ball structure called a morula. After that, morula is converted into a structure called blastula.

2) Adult stem cells are responsible for the maintenance of tissues and repair the damage tissues in the body. It is also called somatic stem tissue. It increase in number through cell division.

3 0
3 years ago
Ecological succession is not important to the survival of ecosystems. true or false?
Leokris [45]

its Falseeeeeeeeeeeeeeeeeeeeeeeeeeeee

6 0
3 years ago
Read 2 more answers
How do both jetties and seawalls help manage beach erosion?
pshichka [43]

Both are hard structures that reduce erosion causes by waves.

7 0
3 years ago
Other questions:
  • At the site of the rough endoplasmic reticulum, proteins that are destined for secretion are manufactured. Insulin is a protein-
    10·1 answer
  • Peptide bonds between amino acids formed primarily on the cells
    9·1 answer
  • Which of the following correctly differentiates the types of muscles based on the type of movement that they produce?
    12·2 answers
  • Why do birds like bread less than seeds
    15·1 answer
  • Sally was analyzing samples of DNA. She had DNA samples from bacteria, a whale shark, a bald eagle, and a human. Just by looking
    14·2 answers
  • Which of the following correctly shows path that energy would flow through this ecosystem?
    12·1 answer
  • The skeletons of a saber-toothed tiger and a present-day tiger are shown above. Which of the following is a structural differenc
    6·2 answers
  • Please Help. First to answer will be crowned Brainlyest
    11·1 answer
  • What is a seedling answer the question​
    14·2 answers
  • How many different sequences of eight bases can you make?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!