Binding of the lac repressor protein to the lac operator is regulated allosterically. This means that the presence of a specific small molecule that binds to the lac repressor controls whether the repressor can bind to the lac operator, and therefore whether the operon is turned on or off. Can you sort the following conditions based on whether they are associated with the lac operon being turned ON or turned OFF?
a. Allolactose is absent
b. Allolactose is present
c. RNA polymerase cannot transcribe the operan genes
d. The lac repressor protein cannot bind to the lac operator
Answer:
a. OFF
b. ON
c. OFF
d. ON
Explanation:
Allosteric regulation is a process by which a particular molecule activates or inhibits an enzyme, by binding to a site different from the active site of the enzyme. Allolactose is a disaccharide that binds to the allosteric site of the lac repressor protein, triggering a conformational change in the protein that prevents the binding of this repressor to DNA. Moreover, RNA polymerase (RNA pol) is an enzyme required for the process of transcription, and therefore when this enzyme cannot bind to operon genes the lac operon is being turned OFF. Finally, the lac operator is a nucleotide sequence where RNA pol binds, and the lac repressor binds to the lac operator in order to block the transcription of the lac operon.
If a red blood cell has a diameter of 8 mm and a student shows it with a diameter of 40 mm in a drawing, what is the magnification of the drawing?
O X5
O X 5000
X0.0002
O X0.2
What happens when the slightest change happens in an ecosystem?
A. It affects the whole system.
B. It affects part of the system.
C. The ecosystem ignores the change.
D. Nothing happens.
HELP FAST
1. Which of these factors can cause an overpopulation of Candida yeasts?
1.contaminated food
2.mosquito bites
3.good hygiene
4:having diabetes
Answer:
having diabetes.
Explanation:
i checked online reading a creditable article and quizlet.
Diabetes can result in an overpopulation of Candida yeasts.
So, option 4: is correct.
Define overpopulation.Overpopulation is an undesirable condition in which the number of current humans exceeds the earth's real carrying capacity. It has a variety of causes, ranging from a decrease in the mortality rate to married girls and other factors.
Diabetes can result in an overpopulation of Candida yeasts.
So, option 4: is correct.
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Scientists who have strong moral beliefs about the subject that they study may show bias in the way they interpret their data
True
False
Please help me
8. Genes are sorted and recombined to produce gametes. Which statement describes a possible result of this process?
A. Gametes always form with genetic material identical to the parent
B.Gametes are formed with the same number of chromosomes as the parent cells
C.Offspring display half of their traits from their mother and half of their traits from their father
D.Offspring have traits not displayed by either parent
Answer:
c option is correct.
Explanation:
gametes are produced by meiosis during which genes get crossed in a process of crossing over ad new recombinent characters are produces. these gametes fertilized and offsprigs have multiple characters they get from their mother and faaher. so offsprimgs have characters half from mother and other half from father.
Genes often produce gametes. The statement that describes a possible result of this process is that Offspring display half of their traits from their mother and half of their traits from their father.
What is genes and gametes?A gene is known to be the molecular unit of heredity of all living beings.
A gamete is known to be a cell that comes together with another cell during fertilization that takes place in organisms that reproduce and this is a product of the male and the female gamete.
Learn more about genes from
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The 4 planets that are closest to the Sun are called terrestial planets while the 4 outermost planets are called 'gas giants' or 'ice giants'.
True
False
Answer:
TRUEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
Explanation:
Answer:
true
Explanation:
they are much bigger than the terrestial planets
Select 2 choices
1-The blood entering the lung is colored bright red.
2-The blood leaving the lung iscolored bright red.
3-The body takes in oxygen and releases carbon dioxide.
4-Oxygen gas is mainly transported via the red blood cell's hemoglobin.
5-The blood leaving the lung is richer in carbon dioxide than the blood entering the lung.
6-Carbon dioxide is mainly transported via the red blood cell's hemoglobin.
Answer and I will give you brainiliest
1 and 5, Solvent, and yh I am not sure but I think so
5. Dieting often leads to weight gain.
True
False
Answer:
the answer is false. Dieting usually leads to weight loss.
Which of the following phenotypic classes reflect offspring that were generated as a result of a crossover event? Select all that apply. Select all that apply. wild type miniature wings garnet eyes miniature wings, garnet eyes SubmitRequest Answer Part B If 800 offspring were produced from the cross, in what numbers would you expect the following phenotypes? __wild type : __ miniature wings : __ garnet eyes : __ miniature wings, garnet eyes Enter your answer as the number of flies of each phenotype separated by a colon (example: 100:300:100:300).
Complete question:
The genes for miniature wings (m) and garnet eyes (g) are approximately 8 map units apart on chromosome 1 in Drosophila. Phenotypically wild-type females (m + g / mg +) were mated to miniature-winged males with garnet eyes.
Part A
Which of the following phenotypic classes reflect offspring that were generated as a result of a crossover event?
Select all that apply.
garnet eyes wild type miniature wings miniature wings, garnet eyesPart B
If 800 offspring were produced from the cross, in what numbers would you expect the following phenotypes?
__wild type : __ miniature wings : __ garnet eyes : __ miniature wings, garnet eyes
Enter your answer as the number of flies of each phenotype separated by a colon (example: 100:300:100:300).
Answer:
Part A:
2. wild type (m+g+/mg)
4. miniature wings, garnet eyes (mg/mg)
Part B:
32:368:368:32
Explanation:
When calculating the recombination frequency, we need to know that 1% of recombinations = 1 map unit = 1cm. And that the maximum recombination frequency is always 50%.
The map unit is the distance between the pair of genes for which every 100 meiotic products, only one results in a recombinant one.
So, en the exposed example:
PART A:
First, we need to Identify the gametes for the individual with the genotype m + g / mg + and label parental and recombinants
Gametes:
m+ g parental type m g+ parental type m+ g+ recombinant typem g recombinant typeKnowing that the only possible gamete type for the other parental is mg, then we can identify the phenotypic classes of the offspring that were generated as a result of a crossover event. These would be
2. wild type (m+g+/mg)
4. miniature wings, garnet eyes (mg/mg)
PART B:
We know that the total number of individuals equals 800.We also know that the distance between genes equals 8 MU.To calculate the number of the phenotypes among the offsprings,
8 map units = 8% of recombination in total
= 8/2% m+g+/mg + 8/2% mg/mg
= 4% + 4%
The recombination frequency of m+g+/mg equals 0.04
The recombination frequency of mg/mg equals 0.04.
100% - 8% = 92% of parental in total =
= 92/2% of m+ g/mg + 92/2% m g+/mg
= 46% + 46%
The recombination frequency of m+g/mg equals 0.46
The recombination frequency of mg+/mg equals 0.46.
The frequency for each ggenotype is:
F (m+g+/mg) = 0.04 F (mg/mg) = 0.04. F (m+g/mg) = 0.46 F (mg+/mg) = 0.46.The number of individuals with each genotype is:
m+g+/mg = 0.04 x 800 = 32mg/mg = 0.04 x 800 = 32m+g/mg = 0.46 x 800 = 368m g+/mg = 0.46 x 800 = 36832 wild type : 368 miniature wings : 368 garnet eyes : 32 miniature wings, garnet eyes
Answer 24-25 please, please do not comment nonsense if not you will be reported. The first accurate and correct answer gets brainliest
Answer:
The first answer is C. photosynthesis
The second is B.
Photosynthesis produces glucose and oxygen, but because the question is asking what food does the equation produce the answer is B not A. Oxygen is a byproduct of photosynthesis and not used by the plant.
Explanation:
There are 252 deer in a population. There is no net immigration or emigration. If 47 deer die and 32 deer are born in one month, what is the population size at the end of the month? Round your answer to the nearest whole number
Answer:
240
Explanation:
252-47=205
205+32=237
237 to the nearest whole number is 240
hope it helps
pls help im begging
Answer:
Im pretty sure Its A (i might be wrong though)
Explanation:
The bark of a tree trunk includes which of the following tissues?
A. primary and secondary phloem
B. Heartwood and phloem
C. Heartwood and sapwood
D. Secondary phloem and layers of periderm
Help so easy with number 5
In Drosophila, grey body is dominant to black, and long wings is dominant to short wings. Two unlinked pairs of alleles, G/g and L/l, cause this pair of traits respectively. Six pairs of flies of unknown genotypes are mated, giving the results listed below. Write the genotypes of the parental flies in each cross using the gene symbols above.
Types of progeny____
Cross Parents Grey Grey Black Black
Long Short Long Short
1 grey long x grey short 43 46 14 17
2 grey short x grey short 0 61 0 23
3 black long x grey long 40 0 44 0
4 grey long x grey long 48 18 0 0
5 grey short x grey long 31 33 0 0
Answer:
GgLl x Ggll ---> grey long x grey short Ggll x Ggll ---> grey short x grey short GgLL x ggLL or GgLL x ggLl ---> black long x grey long GGLl x GGLl or GGLl x GgLl ---> grey long x grey long GGLl x GGll or GgLL x GGll ---> grey short x grey longExplanation:
Due to technical problems, you will find the complete answer and explanation in the attached files
. Gymnosperms are a group of seed plants that produce___
1.seeds, pollen and fruit
2.no flowers or fruit
3.no seeds or pollen
4.flowers and fruit
Answer:
2 is the right answer
Explanation:
they do not produce fruit or flowers think of a pine treee of a spruce tree
Gymnosperms are a group of seed plants that produce no flowers or fruit. Therefore, option B is correct.
What are gymnosperms?A relatively tiny class of plants known as gymnosperms produce seeds and lack flowers. This means that unlike in a fruit, where the seeds are formed inside the reproductive structure, they are produced on the surface of the reproductive structure.
The Coniferophyta, Cycadophyta, Gingkophyta, and Gnetophyta are the four primary phyla that makeup gymnosperms. Conifers, which have needle-like leaves and thrive in arid, cold climates, are the most common gymnosperm.
Some examples of gymnosperms are ginkgo, pine, melinjo. sago palm, cedars, and spruces. Gymnosperms are a group of seed plants that produce no flowers or fruit. Therefore, option B is correct.
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Radiocarbon dating uses a radioactive isotope of the element _______
determine the ages of old objects.
Radiocarbon dating uses a radioactive isotope of the element carbon to determine the ages of old objects.
1.An increase in the population of an organism would most likely be associated with which of the following?
A.an increase in animals that prey on an organism.
B.A decrease in necessary resources.
C.An expansion of suitable living space.
D.A series of severe weather events in the habitat.
Answer:
a series of severe weather events in the habitat
An increase in the population of an organism would most likely be associated with a series of severe weather events in the habitat. The correct option is D.
What is the population?A collection of creatures from the same species that can interact to create fertile progeny. It is on a level above organisms but below the ecosystem and community.
An ecosystem is a level of organization where several communities of various species and the associated abiotic elements interact. It is the place where different population interacts with each other.
A biosphere and a biome are larger organizational levels than this one. Communities are levels of the organization where various populations coexist and engage in social interactions.
Therefore, the correct option is D. A series of severe weather events in the habitat.
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How does cell division relate to the process of asexual reproduction ?
Answer:
sexual reproduction occurs by cell division during mitosis to produce two or more genetically identical offspring. Sexual reproduction occurs by the release of haploid gametes (e.g., sperm and egg cells) that fuse to produce a zygote with genetic characteristics contributed by both of the parent organisms.
Explanation:
hope you like my ans
Will give brainliest How would this change MOST LIKELY affect the various populations over time?
A The change in leaf litter would cause a decrease in each population due to a decrease in each organism’s food supply.
B The change in leaf litter would cause an increase in each population due to an increase in each organism’s food supply.
C The change in leaf litter would cause an increase in level 1 consumers due to an increase in their food supply. Level 2 and level 3 consumers would decrease due to a decrease in their food supply.
D The change in leaf litter would cause a decrease in level 1 consumers due to a decrease in their food supply. Level 2 and level 3 consumers would increase due to an increase in their food supply.
Answer:
i think C but i could be wrong
Explanation:
A population of birds eats nuts and seeds. Some birds have larger beaks, and some have smaller beaks. A pair of birds usually produces four or five offspring each year. After several yeaers of little rain, the seeds became larger and larger. The birds with larger beaks were better at cracking these seeds. After several generations, the average beak size in the population increased. Bird beak size increasing after several generations is: a. decent with modification. b. variation. c. overproduction. d. adaptation
As far as I can tell, the answer would be D. Adaptation. The birds are evolving to adapt to their environment, and as such, their beaks are getting larger to crack larger seeds.
Which statement BEST explains how global warming is causing sea levels to rise
Answer:
A. warmer temperatures are causing glaciers to melt
Explanation:
High temperature extremes and heavy precipitation events are increasing, glaciers and snow cover are shrinking, and sea ice is retreating. Seas are warming, rising, and becoming more acidic, and flooding is become more frequent along the U.S. coastline.
Mendel studied 7 traits in pea plants. One of the monohybrid crosses he made was between plants with round seeds (R) and plants with wrinkled
seeds (0)
Seed
Shape
Round
х
Wrinkled
Round
What was a conclusion that Mendel drew from the F2 generation of this cross?
A.
Three fourths of the F2 plants show the round seed phenotype and carry the dominant allele for roundness.
Answer:
option A
Explanation:
option A is the correct answer of this question .
plz mark my answer as brainlist plzzzz vote me also.
hope this will be helpful to you.
three fourth of f2 plant showed round seed phenotype and carry dominant allele for round ness character.
what is dominant character ?
allele can be defined as a form of a gene which can be present as a pair shows either homozygous or heterozygous phenotype of a character.
these gene can express the phenotype either dominant or recessive form. In a cross between two organism, in F2 generation the offspring's are produced shows three phenotypes homozygous dominant, recessive, heterozygous dominant.
dominant allele can suppress recessive allele.
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How would I explain the carbon cycle to a 1st grade classroom?
Answer:
To a 1st Grader:
Carbon is the magic element that is the basis of life on Earth. All living things contain carbon. Animals breathe it out, and plants breathe it in. Plants, people and animals depend on each other.
The carbon cycle is a process where carbon dioxide travels from the atmosphere into living organisms and the Earth, then back into the atmosphere. Plants take carbon dioxide from the air along with water and photosynthesis from the sun and use it to make food.
Explanation:
The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. Carbon is the main component of biological compounds as well as a major component of many minerals such as limestone. To a first grader is different because they wouldn't understand what half of these words mean lol.
The carbon cycle is the biogeochemical cycle that exchanges carbon between the Earth's biosphere, parallel layers, geosphere, hydrosphere, and atmosphere.
What is the importance of carbon cycle?The carbon cycle is nature's method of recycling carbon atoms, which travel from the atmosphere into organisms on Earth and then back into the atmosphere.
The majority of carbon is stored in rocks and sediments, with the remainder in the ocean, atmosphere, and living organisms.
The carbon cycle is critical to the survival of life on Earth. Nature has a tendency to maintain carbon levels in balance.
This means that the amount of carbon naturally released from reservoirs equals the amount naturally absorbed by reservoirs. Maintaining this carbon balance ensures that the planet remains habitable for life.
Thus, by regulating the rate of carbon dioxide in the atmosphere, the carbon cycle plays an important role in regulating Earth's global temperature and climate.
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The diagram below shows a model of four waves. An image of four waves labeled W, X, Y, Z is shown. Wave W has the smallest distance from crest to crest across the length of the wave. Wave Z has the largest distance from crest to crest across the length of the wave. Wave X has a larger distance from crest to crest than Wave W but are not as far apart as Wave Y. Wave Y has a larger distance from crest to crest than Wave X but not as far apart as Wave Z. Which wave has the lowest frequency? W X Y Z
Answer:
The Answer is D(Z)
Hope this helps-KayPea
Explanation:
Answer:
The Answer is D(Z)
Explanation:
Some types of algae can grow together with fungi. The fungi provide nutrients from decaying matter to the algae, while the energy the algae get from sunlight is shared with the fungi. Based on this information, how would you describe this relationship?
A.The algae is the predator, and the fungus is the prey.
B.The two organisms are in a mutualistic relationship.
C.The fungus is a parasite, and the algae is the host.
D.The two organisms are in competition.
Answer:
Look this up on jkshia. they have all answers on there
Explanation:
NEED HELP WITH THIS QUESTION!!! PLEASE HELP ME!!!
Answer: xylem
Explanation:
Direction of transport : Xylem= Upwards
Phloem=Upwards and downwards
DNA is what type of macromolecule?
Answer:
Nucleic Acid
Explanation:
DNA is made up of the nucleic acids Adinine, Thymine, Cytosine, and Guanine.
Which scenario describes a relationship of mutualism?
A polar bear catches a seal for dinner.
Oxpecker birds eat parasitic ticks off the backs of zebras.
Birds feed off the insects that are stirred up from the grasses as cattle move through.
A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat.
Answer:
hello the answer is B hope this helps
Explanation:
Answer:
b
Explanation: