What two events are are required for maximal lac operon expression?.

Answers

Answer 1
These two events in combination – the binding of the activator and the release of the repressor – allow RNA polymerase to bind strongly to the promoter and give it a clear path for transcription. They lead to strong transcription of the lac operon and production of enzymes needed for lactose utilization.

Related Questions

Compared to a polygenic trait, a single-gene trait tends to have.

Answers

Answer:

the answer is a fewer phenotypes

Innate behaviors are those that are taught by parents to their offspring. i am confused hellpp

Answers

What's the question? Of course parents will teach the offspring. That's how the young ones can grow up and live on their own.

Please helppp with this question

Answers

Heyy.
So i did the alternative activity for this assignment.
In task one I only did part F:
answer:
Weathering damage on Cleopatra's Needle, an Egyptian obelisk in Central Park, New York City, is compared to known weathering rates of granites in various regions. The detrimental influence of the city's environment in 83 years of exposure has been attributed by textbook authors to damage to this coarse-grained foliated granite. As evidenced by the original depth of inscription in New York, about 11/2 inches of maximum surface reduction had occurred. Granite reduction rates in humid regions were calculated to be as low as 0.0076 mm per year, and even lower in deserts. The majority of the damage to the obelisk was caused by rising moisture laden with sulfate salts in Egypt, according to the findings. The hydration pressure of these salts, combined with frost wedging, is responsible for the major damage to the monument, which happened during its first few years in New York.

In task 2 I only did part D
answer:
Two independent sets of observations on sand activities in relation to the flowing river are recorded as the water passes through the meandering river. Stream abrasion can affect the morphology of a stream or river dramatically over time. Because the water can start erosion with anything near it, erosion can impact human communities near rivers.

MAKE SURE YOU SAY THAT YOU DID THE ALTERNATIVE ACTIVITY!!!!

ANSWER IS A

The biodiversity of cultivated crops is currently under threat from industrial
farming and climate change. The extinction of important crop plants
cause mass starvation. Which of the following is the best way for humans to could
use a seed bank to help prevent this problem?
• A. By
storing a great variety of seeds in case one variety goês
in the wild
extinct
• B. By storing a large number of seeds that can be eaten when famine
occurs
• C. By growing a large quantity of crops from seed and selling the
food they produce
• D. By growing a large quantity of
food they produce
crops from seed and storing the food they produced

Answers

The best way for humans to use a seed bank to help prevent the threat to biodiversity of cultivated crops is by storing a great variety of seeds in case one variety goes in the wild extinct.

What is biodiversity?

Biodiversity refers to the variety of life forms that exist on Earth, including the different species of plants, animals, fungi, and microorganisms, as well as the genetic diversity within each species, and the diversity of ecosystems and biomes. Biodiversity is important because it supports the basic ecological processes that sustain life on Earth, such as photosynthesis, nutrient cycling, and pollination. It also provides us with a wide range of ecosystem services, such as clean air and water, food, medicine, and cultural and recreational opportunities.

The best way for humans to use a seed bank to help prevent the threat to biodiversity of cultivated crops is option A, which involves storing a great variety of seeds in case one variety goes extinct in the wild. This approach is important because it helps to preserve the genetic diversity of crop plants, which is essential for breeding new varieties that can withstand changing climate conditions and resist diseases and pests. Storing seeds in a seed bank provides a backup in case a particular crop variety becomes extinct in the wild. It is a cost-effective way to protect the genetic diversity of crop plants and can serve as a long-term solution to the problem of food insecurity.

Option B, storing a large number of seeds that can be eaten when famine occurs, may provide short-term relief during a food crisis, but it does not address the root cause of the problem, which is the loss of biodiversity in cultivated crops. Option C, growing a large quantity of crops from seed and selling the food they produce, and option D, growing a large quantity of crops from seed and storing the food they produced, are both important for food production, but they do not directly address the problem of biodiversity loss in cultivated crops.

Learn more about biodiversity  click here:

https://brainly.com/question/11542363

#SPJ1

its A


just took the test

Which of the following is the model of DNA replication that best accounts for our current understanding of the genetic replicative process?
a. polymerase
b. semiconservative
c. helicase
d. primase

Answers

Answer:

The correct answer is B

Explanation:

I hope this helps and I remember doing this

Assume that hair texture is determined by a single gene. Describe three possible alleles for the hair texture gene

Answers

p(allele for the frequency of straight hair) and q(the frequency for curly hair). Here is an article that should help further explain hair phenotypes!

hetech.org/ask-a-geneticist/three-equally-represented-phenotypes

What is the function of the lymphatic system?

removes worn-out blood cells in the pancreas
circulates plasma through the body to fight infection
delivers nutrients to cells, removes cellular waste, and fights infection
produces red blood cells for fighting infection

Answers

Answer: I believe it is C: delivers nutrients to cells, removes cellular waste, and fights infection.

Forgive me if im wrong but its what I choose on the exam

Answer:

The answer is C!

Explanation:

Contrast apoptosis and cancer.

Answers

Answer:

Apoptosis is a multi-step, multi-pathway cell-death programme that is inherent in every cell of the body. In cancer, the apoptosis cell-division ratio is altered. Cancer treatment by chemotherapy and irradiation kills target cells primarily by inducing apoptosis.

Explanation:

does anyone know what this is?:)

Answers

D) species t and u are related to species x

When visiting a national park, a student encounters an unfamiliar organism in a damp area near a body of water. The students notes that the organism is about 10 cm long, has four legs, and has a tail. The organism is black with small white sports on its smooth, moist skin. It also appears to have an internal skeletal system. To which class does the organism most likely belong?1

Answers

The animal is an Amphibian

How is agarose gel electrophoresis used to separate mixtures of molecules?.

Answers

Answer the following: A. Agarose gels are used in gel electrophoresis to separate what type of molecules: B. At what concentration range (%) are agarose gels typically used? C. Indicate why the concentration of Agarose is increased or decreased in certain Agarose gel electrophoresis applications? D. Polyacrylamide gels are used to separate what type of molecules?
dr naJiiB ibrahim

Practice: Classification using Dichotomous Keys Uh oh! Little Sammy's babysitter forgot to check for monsters under his bed when she tucked him in, and he found all of these when she left. Can you help him determine their names so he can ask them all to leave? Use the dichotomous key on the next page to help you.​

Answers

A dichotoums key uses morphological and molecular traits to classify organisms into different taxonomic groups.  

What is a dichotomous key?

A dichotomous key might be considered a useful tool to classify organisms. The key provides an easy and fast way for identification by describing different morphological and molecular traits, leading you to the correct taxonomic classification.

It is simple to read a dichotomous key. The term dichotomous refers to how information is provided. You will always have two options (a and b, or 1 and 2), and you will have to choose one of them according to the characteristics of your organism. The key describes specific morphological oir molecular traits of organisms and you need to choose between the options which ones matches the ones of your organism.

Probably you might need an atlas or a dictionary to understand some of the technical terminologies. You will also need to carefully observe your specimen, to get to distinguish different traits. If the specimen is too small you might need a loup.

Since I do not have your dichotomous key, we are going to analyze a simple example using a group of 5 organisms. We will make the classification according to the description (organisms in the attached files).

Dichotomous key

Statement 1a ----------- The organism is a vertebrate ----------- Frog

Statement 1b------------ The organism is invertebrate ----------- Go to 2

Statement 2a ---------- The organism has a multisegmented

                                   and elongated body, with too many  ----- centipede

                                   legs.

Statement 2b ---------- The organism has a relatively short body

                                   and with fewer legs ------------------------------ Go to 3

Statement 3a ----------- The organism has 8 legs ----------------------- Spider

Statement 3b ----------- The organism has 6 legs ----------------------- Ant

As you can see, this a very simple example, but ilustrates how the key provides enough information for you to reah the correct option.

So in your example, your dichotomous key will probably provide you information about different traits such as body-color, number of extremities, hair, and other, and you will have to observe the all your individuals and choose which trait matches each of them.

You will learn more about dichotomous key at

https://brainly.com/question/16522014

https://brainly.com/question/2235448

In an animal cell, DNA is found in the greatest

concentration in the

(1) vacuole

(3) nucleus

(2) ribosome

(4) cytoplasm

Answers

Answer:

the nucleus

Explanation:

it's not necessary for the DNA to be in the nucleus but i guess it acts as a protection?

4 Which of the following elements is considered to be the building block of life?
F oxygen
G hydrogen
H nitrogen
J carbon

Answers

Answer:

F oxygen

Explanation:

we need oxygen for respiration and hydration

you and a friend are discussing human evolution. your friend insists he has been told that humans arose directly from chimpanzees. you disagree with your friends concept of human evolution. present an argument to help your friend obtain a better understanding of human evolution and the origind of humans as a species. your answer must include refrences to both humans and apes.

Answers

Answer:

yes

Explanation:

Humans are made when a man and woman have a good time together and yea also apes didnt raise humans or anything its been scientifically proven so yeah

A quadrilateral has congruent side lengths. 2 opposite angles have measures of 100 degrees. The other 2 opposite angles have measures of 70 degrees and (5 x) degrees. What is the value of x? 14 15 16 17.

Answers

It should be 18 because:
100 x 2 = 200
200 + 70 = 270
360 - 270 = 90
90/5 = 18
So x = 18

(A.) 14

Hope this helps!!! <3
Don't forget to drink water!

how was your eye color determined

Answers

Answer:

2, phenotype

traits are determined using genetics

Can you tell for certain if eleanor is a definite carrier for methemoglobinemia

Answers

Answer:

It is hard to say for sure if Eleanor Fugate is a carrier for methemoglobinemia. If we knew that Martin (her father) was definitely blue, then the answer would be yes. However, because we do not have that information, nor information about her offspring, we can not tell for certain

Whats the chemical equation of cellular respiration

Answers

Cellular Resperation = C6H12O6 + 6O2 → 6CO2 + 6H2O.
Photosynthesis: 6CO2 + 6H2O → C6H12O6+ 6O

How long does it take for steroids to get out of your system?.

Answers

Answer: It takes 14 days for steroids to clear out your system

Explanation:

How do you predict the embryo of an
eagle would compare to the embryos
shown in the photographs? Apply patterns
to make your prediction.

Answers

Answer:

✏Embryology Evolution Evidence. Darwin’s theory of biological evolution noted that all vertebrates have gill slits and tails in early stages of embryo formation, even though these features may be lost or modified in the adult-form phenotype. For instance, human embryos have a tail that becomes the tail bone.

Explanation:

Which statement best describes the relationship between cellular respiration and photosynthesis?
Group of answer choices

A. Cellular respiration produces oxygen, which is the reactant required for photosynthesis.
B.Cellular respiration produces carbon dioxide, which is the reactant required for photosynthesis.
C. Cellular respiration and photosynthesis have the same products but use different reactants.
D. Cellular respiration and photosynthesis are the same processes; one occurs in animal cells and the other in plant cells.

Answers

Answer:

cellular respiration produces carbon dioxide which is the reactant required for photosynthesis

Hemorrhagic fevers are caused by RNA enveloped viruses which include all of the following EXCEPT A) arenavirus. B) filovirus. C) flavivirus. D) arbovirus.

Answers

Answer:

D) arbovirus.

Explanation:

D is not to be included

Which structure in the figure above produces bile?
A
B
C
D​

Answers

Answer:

B gallbladder

hope it helps

i think the answer is B

If you block histone deacetylase, what effect would you expect to see on transcriptional activity?.

Answers

Histone deacetylase is responsible for removing the acetyl group from the histone 3 lysine 9 residue. Remember that deacetylation is one step in converting euchromatin to heterochromatin. Because euchromatin is transcriptionally active (transcriptional machinery is able to reach gene of interest), and blocking histone deacetylase activity would result in an the DNA remaining as euchromatin, we would expect to see an increase in transcriptional activity.

So there’s your answer: An increase in transcriptional activity.

Question 1
Which statement about cells is false?
a
b
Different cells work together to form tissues and organs.
Cells are the basic structure of living things.
New cells contribute to growth and repair.
Cells contribute only to the reproduction of an organism.
C с
d

Answers

Answer:

the last one which I'm guessing is d......cause it kinda messed up

Calculate the total magnification of a microscope image using x20 eyepiece lens and x60 objective lens

Answers

Answer:

magnification : objective lens × eyepiece lens

60x × 20× = 1200×

Which curve would most likely represent the behavior of the receptor once it has been activated by its signal molecule?

Answers

Answer:

slow rising check mark curve

Explanation:

Immediately after fertilization, the united egg and sperm is called a:.

Answers

Immediately after it is called a zygote

What did Griffith use to kill the
pneumonia-causing bacteria?
A. antibiotics
B. heat
C. healthy bacteria

Answers

Answer:

B. Griffith used heat to kill pneumonia-causing. :)

Explanation:

Other Questions
Write the equation of the line that is perpendicular to the line which has a slope of 3 / 4 and passes through the point ( 0, - 4 ). what is the answer 5x+9-4x=17 to what extent was the mongol empire different from other postclassical states From a regular octagon, a triangle is formed by connecting three randomly chosen vertices of the octagon. What is the probability that at least one of the sides of the triangle is also a side of the octagon Find the solution of the system of equations. 9x - 9y = -9 and 3x + 9y = -15 Whats the answer???????#15 Mrs. Jones has eight equal-sized poster boards. She divides them evenly among three students. Between which two whole numbers does the number of poster boards each student gets lie? Which expression is equivalent to 0.90? 1011 910 9010 111 The speaker uses a "simile" in this passage. (A simile is when two things are directly compared using the word AS or LIKE. ) What does the simile "a feeble band that fly before your soldiers as the deer before the hunter" represent? A. The acrobatic abilities of the Indians B. The gracefulness of the Apaches C. The soldiers' great hunting skills D. The frailty of th To reconstruct a face, which of the following characteristics can NOT be determined from the skull? shape of the jaw shape of the cheekbonesShape of ears width of eyes Volume with fractions Miguel is flying a kite, holding his hands a distance of 3.5 feet above the ground and letting all the kites string play out. He measures the angle of elevation from his hand to the kite to be 25^{\circ} . If the string from the kite to his hand is 150 feet long, how many feet is the kite above the ground? Round your answer to the nearest tenth of a foot if necessary. What is the first step you should take when you compare and contrast the structures of two articles?1. identify the structure of the first article.2. Write some sentences summarizing each article.3. Look for ways the two structures are different.4. Look for ways the two structures are alike. My parents had PURCHASED a large supply of bottled water.noneO gerundO infinitiveO participle After adding the numbers the result obtained is called the total or the sum What does it mean when someone says thats what you think of me. Solve and graph on a number line. Show your work in the box below.7x + 10 < 11x + 2 Can someone please help me? :( PLEASE HELP WILL MARK BRAINLESSWhat would happen if calcium was continuously released from the sarcoplasmic reticulum? a. metabolic rate would decrease b. skeletal muscle would not contract c. continuous skeletal contraction would occur d. body temperature would decrease Please help me on this question about circle chords, find x.A. 26.3B. 21.1C. 11.8