The Lac Operon is a set of genes that controls the production of lactase the enzyme that digests
lactose. In the top picture: The gene is "turned off" resulting in no mRNA being made. In the
bottom picture: The gene is "turned on" allowing the RNA polymerase express the genes,
resulting in production of the lactase enzyme.
which statement is not correct about the lac operon?
Answers
Answer:
The lactose present prevents the production of lactase
Explanation:
This question is describing a set of genes in bacteria called LAC OPERON. Lac operon controls the production of lactase, which is the enzyme that digests lactose. However, this gene can be regulated at the transcription level i.e caused to be transcribed or not depending on certain factors.
According to the question, lac operon, which regulates the production of enzymes will be transcribed and subsequently translated i.e. turned on when there is a substrate (lactose) that the produced enzyme will work on. However, when there is no need of the lactase enzyme or there is absence of lactose (substrate), the lac operon gene is turned off.
Note that, the statement that "The presence of lactose prevents the production of lactase" is not correct.
Related Questions
HELPPP ITS FOR BIO AND SHE WONT LET ME TURN IT IN IF I DONT ENTER IT TOMORROW!!
Answers
What animals belong to the subphylum cephalochordata?
Answers
Answer:
subphylum of cephalochordata are called lancelets
Which explanation accurately describes the structure of a nucleic acid and how it is involved in the process of gene expression?
A
mRNA is single-stranded and is involved in transcription.
B
SnRNA is single-stranded and is involved in replication.
С
rRNA is double-stranded and is involved in translation.
D
ERNA is double-stranded and is involved in translation.
WILL RANK BRAINIEST HELP ASAP!!!
Answers
The explanation 'mRNA is single-stranded and is involved in transcription' accurately describes the structure of nucleic acid and how it is involved in the process of gene expression.
During gene transcription, a fragment of DNA called gene is used as template to create a complementary messenger RNA (mRNA).Subsequently, this mRNA is then used as template to generate a protein by a process called translation.This mRNA is a single-stranded nucleic acid instead of a double-stranded nucleic acid (like DNA).In conclusion, the explanation 'mRNA is single-stranded and is involved in transcription' accurately describes the structure of nucleic acid and how it is involved in the process of gene expression.
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Which is the best description
of transverse waves?
A. A transverse wave squeezes together,
B. A transverse wave moves up and down,
C. A transverse wave travels in a circle.
Answers
Answer:
B. A transverse wave moves up and down
Explanation:
A transverse wave is a wave in which particles of the medium move in a direction perpendicular to the direction that the wave moves.
Which corrections should be made to describe
photosynthesis accurately? Check all that apply.
O (1) Light energy and chemical energy should be
switched.
(1) Chemical energy should be changed to
mechanical energy.
(3) Plants that contain chlorophyll should not be
included.
0 (3) Oxygen should be changed to carbon dioxide.
0 (4) Animals and plants should be switched.
Answers
Answer:
1) Light energy and chemical energy should be switched
3) Plants that contain chlorophyll should not be included
5) Animals and plants should be switch
Explanation:
Photosynthesis is a biological process through which green plants make their own food in the presence of sunlight. So, photosynthesis is a process in which Light energy is converted to chemical energy.
Plants carrying chlorophyll should not be included as their primary source is light, carbon dioxide and water.
During photosynthesis, plants make oxygen and releases it into atmosphere which is further utilized by animals or humans for metabolic activities so, photosynthesis allows the flow of energy from plants to animals.
Hence, the correct answers are " 1, 3, and 5."
Answer:
1, 3, 5 ez as that
Explanation:
Which of the following are the characteristics of all living things? (Hint= choose seven)
Question 1 options:
Contains genetic material
Creates or uses energy
Maintains homeostasis
Responds to the environment
Has organs and organ systems
Growth
Consumes food for energy
Reproduces
Answers
Answer:
b,c, d,e,f,g
Explanation:
I had it on a quiz
Which of the following does NOT describe a fluid?
Answers
Answer:
list them
Explanation:
Answer:
plz list the answers :)
Explanation:
Which of the following occurs in lactic acid fermentation?
a. Electrons pass through the electron transport chain.
b. Oxygen is consumed.
c. Lactic acid is converted into pyruvic acid.
d. NAD+ is regenerated for use in glycolysis.
Answers
Answer:
D
Explanation:
Thats all i know hope it helps
Lactic acid is created when pyruvate is reduced to make it, while NAD+ is created when NADH is oxidized. Reducing pyruvate to lactate requires a proton from NADH and electrons from the molecule. Thus, option D is correct.
What is the role of Lactic acid fermentation?Anaerobic respiration occurs when human muscle cells do not receive enough oxygen. So, the fermentation of lactic acid results in the production of energy molecules. The result of this process is lactic acid.
Oxidize electron transporters to allow for glycolysis re-use. Without the aid of oxygen, fermentation enables cells to generate chemical energy from the breakdown of sugar, such as glucose.
Therefore, in lactic acid fermentation, NAD+ is regenerated for use in glycolysis.
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A bacterium can reproduce quickly by splitting into two cells. Which of these best describes the genetic make-up of the resulting two cells?
a/They have the same amount of genetic material and are identical.
b/They have the same amount of genetic material but are not identical.
c/They have half the amount of genetic material, which grows in size.
d/They have half the amount of genetic material, but then it duplicates itself.
Answers
Answer:
A . They Have The Same Amount Of Genetic Material And Are Identical
Explanation:
I need help on this question
Answers
Members of a population belong to
Answers
Answer:
gene pool? species?
Explanation:
Question is a bit vague hope this helped tho :(
Present one example of a human activity that threatens
ecosystems and biodiversity.
Answers
Answer:
One example is overpopulation. Meaning the more people there are in a place, the more room there needs to be. This then leads to deforestation, destroying animals habitats forcing them to leave. The more animals that leave, the less animal diversity there is.
In cats, the bones in the legs involved in
walking are very similar to the bones of
whales' flippers that are involved in
swimming. These are examples of -
F: analogous structures
G: homologous structures
H: vestigial structures
J: endosymbiosis
Answers: G
Answers
Answer:
Your answer is most likely G), so you are correct.
These are the example of Homologous structure. So, the correct option is (G).
What are different types of structures?Homologous structures are similar in structure and location, but perform different functions, resulting in divergent evolution. For example, An arm of a human, the leg of a dog or a flipper of a whale are all homologous structures.
Analogous structures are similar in function but have different origins and structures resulting in convergent evolution. For example, from wings in birds, bats and insects to fins in penguins and fishes are all analogous structures.
Structures with similar anatomy, morphology, embryology, and genetics, but dissimilar functions are known as homologous structures, while structures that are superficially similar but perform the same physiological function are referred to as analogous structures.
Thus. these are the example of Homologous structure. So, the correct option is (G).
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why is the percentage of food eaten a good thing to use
Answers
Answer:
Good nutrition is important throughout your life! It can help you feel in your best condition and stay strong. It can help reduce the risk of some of the common illnesses among older adults.
1. Calculate the density of a piece of wood with a volume of 216cm3 and a mass
of 64g
Answers
Answer:
Density = Mass/Volume
Density = 216cm3/64g
Density = 3.375 g/cm3
Let me know if this helps!
PLS HELP!! ILL MARK BRAINLIEST
1.
Why, as a biology student, do you need to know Chemistry?
2.
What is the radius of a Carbon atom?
3.
Where is the majority of the mass of an atom found?
4.
Describe the location and charge of a proton.
5.
Describe the location and the charge of a neutron.
6.
Describe the location and charge of an electron.
I
7.
Like charges
8.
Unlike charges
9. What are the three names commonly used to refer to the places where electrons can be
found?
10. Approximately,
manmade.
elements are found naturally on Earth. The others are
11. How does the Periodic Table organize elements? (2 answers)
Answers
Answer:
1. While Biology is the study of living things, living things themselves are made up of chemical composition. Our survival is dependant on the reactions taking place inside and outside the body. Hence, to understand living things, biologists needs a good understanding of chemistry.
2. 170 pm is the radius of a Carbon Atom.
3. The vast majority of the mass of an atom is concentrated in its nucleus
4. Protons are found in the nucleus of the atom. This is a tiny, dense region at the center of the atom. Protons have a positive electrical charge of one (+1) and a mass of 1 atomic mass unit (amu), which is about 1.67×10−27 kilograms.
5. Neutrons are located with protons in the nucleus; they too exchange mesons with protons and with each other to form the strong nuclear force, but they do not have to overcome the repulsion from Coulomb forces since neutrons are not charged.
what develops as the dna molecule unzips with replication occurring on both strands at the same time
Answers
Answer:
The double-stranded parent DNA molecule gets separated and provides two template DNA strands for daughter strands synthesis. Enzyme DNA polymerase adds nucleotides complementary to template strands and synthesize daughter strands.
Explanation:
Answer:
The a cell divides, it is important that each daughter cell receives an identical copy of the DNA. This is accomplished by the process of DNA replication. The replication of DNA occurs during the synthesis phase, or S phase, of the cell cycle, before the cell enters mitosis or meiosis.
Explanation:
How much dna is in each nucleus of each cell
Answers
Answer: Look below =3
Explanation: That makes a total of 6 billion base pairs of DNA per cell. Because each base pair is around 0.34 nanometers long (a nanometer is one-billionth of a meter), each diploid cell therefore contains about 2 meters of DNA [(0.34 × 10-9) × (6 × 109)].
Each cell has 1 DNA. When it is mitosis, a piece of DNA breaks down into thing called chromosome.
Hope This Helps! Have A GREAT Day!
Name the 5 characteristics of a mineral
Answers
Answer:
They are natural, inorganic, solid, and are chemical composition and have a crystalline structure.
Which two statements describe what happens to the nucleus of an atom
during a fission reaction?
A. A small amount of the energy in the nucleus is converted to
mass.
B. Nuclei with small masses combine to form nuclei with larger
masses.
C. Large nuclei break apart into two or more smaller nuclei.
D. Each nucleus formed has fewer protons than the original nucleus
had.
Answer is c and d
Answers
Answer:
Answer is c and d
Explanation:
A negative feedback loop is a reaction that causes a decrease in function. Often, it causes the output of a system to be lessened; so, the feedback tends to stabilize the system. This can be referred to as homeostasis, as in biology, or equilibrium, as in mechanics.
What is baseline imbalance?This is simply known as a form of art that pertains to systematic error when producing an intervention groups in any clinical trial. In this type of imbalance, the groups differ in baseline traits due to the fact that the participants were selected or assigned.
There are different ways to balance a load. Why is the figure considered to be an example of a negative feedback system as opposed to a positive feedback system is that The figure shows the correction of an imbalance back to a baseline.
Therefore, A negative feedback loop is a reaction that causes a decrease in function. Often, it causes the output of a system to be lessened; so, the feedback tends to stabilize the system. This can be referred to as homeostasis, as in biology, or equilibrium, as in mechanics.
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HELPPPPPP.......30 points DONT ANSWER IF YOU'RE NOT GOING TO HELP I WILL REPORT YOU
The image shows a lake, a factory, a cloud in the sky, a cow, dead organisms, a tree, and the sun. An arrow from the sun to the tree is labeled A. An arrow from the sky to the tree is labeled B. The sky is labeled C above the cloud. The letter D is in the air and an arrow points from it down to dead organisms. An arrow points from dead organisms to the ground labeled E. An arrow points from the cow into to the sky labeled F. An arrow points from the factory to the sky labeled G. An arrow from the sky to the lake is labeled H above the lake.
Using the diagram above, match the description to the corresponding location in the carbon cycle model. Provide the letter only.
Carbon dioxide is converted to sugar used for food.
Carbon trapped in fossil fuels is converted to carbon dioxide.
Organic carbon is converted to fossil fuels.
Carbon dioxide is converted to carbonates.
Sugar is broken down and converted to carbon dioxide.
Location ________
Location ________
Location ________
Location ________
Location ________
Answers
Answer:
A - 1. Carbon dioxide is converted to sugar used for food (this is process of phosynthesis).
G - 2. Carbon trapped in fossil fuels is converted to carbon dioxide (this is combustion of fuel).
E - 3. Organic carbon is converted to fossil fuels.
H - 4. Carbon dioxide is converted to carbonates.
F - 5. Sugar is broken down and converted to carbon dioxide (this is breathing).
Explanation:
hope this helps
Two processes needed for survival of life on this planet are cellular respiration and photosynthesis. How are cellular respiration and photosynthesis mutually dependent ?
A. Photosynthesis releases energy and cellular respiration stores energy.
B. Photosynthesis releases carbon dioxide and cellular respiration releases oxygen.
C. Photosynthesis removes oxygen from the atmosphere and cellular respiration replaces it.
D. Photosynthesis removes carbon dioxide from the atmosphere and cellular respiration replaces it.
???
Answers
Photosynthesis and respiration depend on each other and complement themselves. Option D. Photosynthesis removes carbon dioxide from the atmosphere and cellular respiration replaces it.
Why are Photosynthesis and respiration complementary processes?Photosynthesis occurs in chloroplasts, while respiration occurs in mitochondria.The photosynthetic process needs solar radiation to produce organic compounds, while the respiration process needs the organic compounds to obtain chemical energy.Photosynthesis transforms CO₂ into organic compounds, while respiration transforms organic compounds into CO₂.In the process of photosynthesis, it occurs a release of oxygen, which is then used during the respiration process. Both processes produce energy, which will be used in other cellular reactions.Respiration´s final products are CO₂, ATP, and waterPhotosynthesis´s final products are carbohydrates and oxygen.
The correct option is D. Photosynthesis removes carbon dioxide from the atmosphere and cellular respiration replaces it.
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To calculate the Percent of Cells in each phase, use the number of cells counted in that phase divided by the total number of cells and multiply by 100. Round to whole numbers.
Answers
Answer:
Yes.
Explanation:
Yes, to calculate percentage of cells in each phase, we will divide the total number of cells in each phase of mitosis or meiosis by the total number of cells, and then multiply by 100 to get the percentage of cells in each stage. In that way we can find out that how many cells present in which phase of the cell cycle. Most of the cells about 80 to 90 % of cells spent their time in interphase.
Name the disease in which:
a) A person fears from water
b) Yellowing of skin takes place
Answers
Explanation:
pagal jjhgghg fossil hjiuyyyyyyyyyyyyyyyyyy
Can someone tell me what's the syllabus taught in American high schools, like in 10th grade? I'm not an American student and I'm just curious. (didn't mean to sound creepy). thank you so much.
Answers
Before higher education, American students attend elementary and high school for a combined total of 12 years. These years are known as the period from first grade to twelfth grade.
At the approximate age of six, American children begin elementary school, which is exclusively called “elementary school” (elementary school). They attend this school for five or six years and then go on to high school.
High schools are made up of two programs: the first is called "middle school" or "high school" (middle school) and the second is called "high school" (high school). A diploma or certificate is awarded upon graduation from high school. Upon graduation from high school (twelfth grade), American students can go on to college or university. Studies at a college or university are known as "higher education."
Summarize taste considerations.
Answers
The word taste, or gustation, to give its full name, refers to what is detected by the taste cells, located on the front and back of the tongue and on the sides, back and roof of the mouth. These receptor cells, or taste buds, bind with molecules from the food or drink being consumed and send signals to the brain.
Which process describes how many pure-bred dogs have been produced?
A. Cloning
B. Crossbreeding
C. Selective breeding
Answers
Answer:
C.
Explanation:
While I'm against forcing animal to breed, I know the studies sorta.
Identify the source of energy for photosynthesis.
Answers
Answer:
I think it is the sun
Explanation:
Answer:
its the sun
Explanation:
When the sun hits the chlorophyll in the plants leaves it starts the cycle of making glucose and oxygen ( the sun is what powers photosynthesis)
PLZ HELP WILL GIVE BRAINLIEST 35 POINTS
The cambium is a section of cells in a plant that can become either part of the xylem or phloem, depending on the growth and needs of the plant. If the cambium of a plant was damaged, what would be the most likely effect on the plant?
The plant would lose its ability to carry out photosynthesis.
the plant would have uncontrolled growth.
The plant would not experience any change in physiology.
The plant would not be able to transport nutrients and water.
Answers
Answer:
the plant would not be able to carry out photosynthesis
Explanation:
Eggs and sperm are called gametes. What problem would result if gametes were diploid?
Answers
Answer: If gametes were produced instead by mitosis each gamete would be diploid not haploid. During fertilization of diploid gametes, the zygote would become 4n=92. With each new generation the number of chromosomes would double.
Explanation:
Answer:
If gametes were diploid, the resulting organism would have too many chromosomes.
Explanation:
Hope this helps