Imagine you are introducing the Lac operon and the Trp operon to students who have never learned about it before.
Complete the table to compare the similarities and differences between the two operons.
Answers
Type of operon:
Trp operon is a repressible operon
Lac operon is an inducible operon.
Environment:
Trp operon is deactivated when tryptophan is present in the environment.
Lac operon is activated when lactose is present in the environment.
Repressor protein:
Trp operon is activated by tryptophan through bonding to the repressor protein
Lac operon is inactivated by lactose through binding to the repressor protein.
Transcription:
Trp operon -Tryptophan binds to the repressor protein, activating it, thus preventing active transcription of Trp operon.
Lac operon - Lactose binds to the repressor protein, deactivating it, thus allowing for active transcription of Lac operon.
An operon is a unit of DNA found in prokaryotes, containing a cluster of genes under the control of a single promoter and which performs a specific function. Examples of operons are the tryptophan (Trp) and lactose (Lac) operons.
Trp operon is responsible for tryptophan synthesis while Lac operon is responsible for lactose transportation and metabolism.
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Answer:
answer below
Explanation:
straight from edmentum
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Answer:
Algae are single celled aquatic plants that need sunlight, food and carbon dioxide in order to thrive. So, the two elements that algae thrives on are nutrients and warm temperatures.
Explanation:
Two black-fur mice are bred, and have the litter shown below. What is the most likely explanation for the presence of the white-fur offspring?
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an alike gene I think idk
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Both of the parents are heterozygous.
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Which DNA fingering technique examines the length variation of DNA repeat sequences in human DNA?
A) VNTRs (variable tandem repeats)
B) PCR (polymerase chain reaction) analysis
C) STRs (short tandem repeats)
D mtDNA (mitochondrial DNA) analysis
Answers
Answer: The question is incorrect, below is the correct question
Which DNA FINGERPRINTING technique examines the length variation of DNA repeat sequences in human DNA?
The correct answer to the question is option D
mtDNA (mitochondrial DNA) analysis
Explanation: DNA fingerprinting technique is a laboratory technique used by geneticists.it entails placing of DNA samples into wells,these wells are then placed in a slab of gels and thereafter passing a current through the gel.This is done to ascertain the uniqueness of a DNA pattern and thus be able to differentiate people of same species.
There are several methods of DNA fingerprinting as outlined in the options given with the question.
In mtDNA (mitochondrial DNA) analysis,The Genetic samples are extracted from the biological materials, these samples extracted are total genomic DNA like hair,tooth or samples of blood, Several copies of these genomic DNA are then produced using a polymerase chain reaction and flanking primers inorder to examines the length variation of DNA repeat sequences in human DNA.
Answer:
D. Mitochondrial DNA Analysis
Explanation:
Edg 2021
science question help?
Answers
Answer: The answer for question 8 would be C and the answer for question 6 would also be C.
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Answer:
replication. DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.
Explanation:
Which best describes a virus
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Answer:
Viruses are nonliving and infect host cells.
Answer:
A virus is an infectious agent and it only spreads inside living organisms. They can attack anything that is living... animals, plants, people, ecs
Explanation:
The first model represents the proton and neutron distribution in the nucleus of four helium isotopes. The second image shows the entry for helium in the periodic table. Based on the information in the periodic table, which is the most common isotope of helium?
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Answer:
Helium exist as an isotope, its most common isotope is the one that is placed on the periodic table. The helium atom on the periodic table has two electrons, two protons and two neutrons. The proton and the neutron are located inside the nucleus, this means that two protons and two neutrons can be found inside the helium nucleus. Thus, in the pictures given above, the correct picture is the one that contain four particles.
Explanation:
Explain how is it possible to have twins that are not identical
Answers
Fraternal (dizygotic) twins come from 2 different fertilized eggs that both grow in the mother's womb. They have different DNA (2 eggs from the mother, 2 sperm from the father) and are not identical, although they often look alike.
Identical (monozygotic) twins come from one fertilized egg that has split in two. These twins share the same DNA and are completely identical.
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Name two potential pollinations???
Answers
Explanation:
male anther of a flower to the female stigma of a flower. This helps to bring about fertilization of the ovules in the flower by the male gametes from the pollen grains.
Insect pollinators include bees, (honey bees, solitary species, bumblebees); pollen wasps (Masarinae); ants; flies including bee flies, hoverflies and mosquitoes; lepidopterans, both butterflies and moths; and flower beetles. Vertebrates, mainly bats and birds, but also some non-bat mammals (monkeys, lemurs, possums, rodents) and some lizards pollinate certain plants. Among the pollinating birds are hummingbirds, honeyeaters and sunbirds with long beaks; they pollinate a number of deep-throated flowers. Humans may also carry out artificial pollination.
A pollinator is different from a pollenizer, a plant that is a source of pollen for the pollination process.
What kind of waves are present during an earthquake?
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Answer:
Seismic Waves (S-Waves) and Primary Waves (P-Waves)
Explanation:
Only one ______ can be explored in an experiment.
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Answer:
Multiple answers
Explanation:
Cells,
E.g. onion cell
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What might happen to the organisms in the food web below if the number of phytoplankton and vegetation drastically decreased?
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Answer:
i don't now exactly how to answer this when theres' no food chart however as the vegetation and phytoplankton drastically decrease everything decreases. This is because the producer the bottom of the food chain also known as vegetation is the prime source of energy in every food chain. when there's scarce amounts of producers a domino affect will occur. There will be no food for the first consumers to eat leading their population to decrease and the animals that feed off them will decrease then the animals that feed of them will decrease and so on until the organisms of the food web die out.
In living things, traits are passed on from one generation to the next by the transfer of ??
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Which of the following Venn diagrams would BEST be suited to represent the three categories of animals?
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Answer:
intersecting circle and the universal affarmative
Explanation:
PLEASE HELP !!! Match the following terms and definitions.
1. the testing of a hypothesis in duplicate with only one factor being different
scientific method
2. an assumed explanation for a problem
hypothesis
3. a recognized means of inquiry to provide scientific answers to questions
theory
4. supported by evidence gathered over a period of time
controlled experiment
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Answer:
Controlled experiment: the testing of a hypothesis in duplicate with only one factor being different.
Scientific Method: a recognized means of inquiry to provide scientific answers to questions.
Hypothesis: an assumed explanation for a problem
Theory: supported by evidence gathered over a period of time
Hope this is right!!!
The body needs to use anaerobic respiration during ___________
Answers
Answer:
hard exercise
Explanation:
The body needs to use anaerobic respiration during hard exercise.
Anaerobic respiration transfers energy from glucose to cells. It occurs when oxygen is not present. It transfers large amounts of energy quickly.What occurs during a decomposition reaction?
New compounds are formed by chemical bonding
The components of several molecules recombine to form new molecules,
A compound partitions into its components,
Answers
Answer:
A compound partitions into its components,
Explanation:
Decomposition reaction is a type of chemical reaction occur when compounds partition of breakdown into new components or elements.
An example is the decomposition of hydrogen peroxide. Hydrogen peroxide decomposed to water and oxygen. Another example is the decomposition or breakdown of water into hydrogen and oxygen.
Answer:
A compound partitions into its components
Explanation:
.. How do you decide what's enough stress for an infant or toddler?
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B. Alleviate the stress as soon as it's detected. Infants/toddler stress isn't healthy at any level
C. Stay calm, watch the child's actions, and try to imagine what the child is feeling
D. Let the child manage the stress by him or herself without interfering
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Answer:
B
Explanation:
Answer:
C. Stay calm, watch the child's actions, and try to imagine what the child is feeling
Explanation:
Infants and toddlers are not able to communicate their feelings and emotions effectively. Caregivers need to observe the child's actions and body language to understand what the child is feeling. By staying calm and observant, caregivers can provide the right amount of support to help the child manage stress.
What do proteins, nucleic acids, and carbohydrates all have in common?
A. They all use peptide bonds to form macromolecules.
B. They all contain the instructions for building organisms.
C. They are all formed from the same elements. D. They are all made of chains of amino acids.
Answers
Answer:
c)they are all formed from the same elements
Explanation:
that is carbon,hydrogen and oxygen but e.g proteins have additional like Nitrogen
how do apple and pinaples grow
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Answer:
apples grow on a tree, so do pineapples i think
Explanation:
Indicate whether each effect of climate change on Alberta would be expected (E) or would not be expected (NE). Place your answer in the blank space given.
a. more stable weather conditions
b. more wheat and less canola grown as crops
c. greater threat to forests from insect pests
d. greater biodiversity of wetland species
e. better agricultural conditions in northern Alberta
f. improved air quality in urban areas
thanks!
Answers
Answer:
a. more stable weather conditions --- NE
b. more wheat and less canola grown as crops ---E
c. greater threat to forests from insect pests ----E
d. greater biodiversity of wetland species ----E
e. better agricultural conditions in northern Alberta ----E
f. improved air quality in urban areas-----NE
Explanation:
The climate of Alberto change with the increase in temperature which disturb the weather condition of the region. This increase in temperature decreases the production of wheat crop so more wheat crop is cultivated for fulfilling the needs. This increase in temperature make the environment more suitable for different organisms. The climate is cold during winter so increase in temperature causes condition suitable for agriculture in northern Alberta. Improved air quality in urban areas is not possible due to more production of carbondioxide gas which leads to increase in temperature.
Polar bears feed on seals. So, polar bears and seals share a . Climate change has caused ice caps to melt in colder regions where polar bears live. This change has caused them to hunt less. This situation will lead to .
Answers
Polar bears and seals are animals that share a prey-predator relationship, whereas climate change causes less biomass at the quaternary level.
What is the prey-predator relationship?The prey-predator relationship is s type of ecological association where one species is hunted (the prey) by another species.
Moreover, climate change is well known to produce global warming and melting ice on the Earth's poles.
In conclusion, polar bears and seals are animals that share a prey-predator relationship, whereas climate change causes less biomass at the quaternary level.
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Identify the structures of the heart.
Label A
Label B
Label C
Label D
Label E
Label F
Answers
The below mentioned levels shows the different structures of heart according to the given diagram:
Label A - Pulmonary Valve
Label B - Tricuspid Valve
Label C - Septum
Label D - Bicuspid Valve
Label E - Aortic Valve
Label F - Aorta
What is circulatory system ?A circulatory system is defined as a system in the body that consists heart, blood vessels, arteries, veins and blood that all combined together to supply blood to all parts of body and takes up waste material from it.
Circulatory system have four major components and these are heart, veins, arteries, and blood. These are the four components that combined and form cardiovascular system.
Pulse rate or heart rate is the speed of heart beat measured number of contraction of the heart per minute. The heart rate can vary according to physical needs of human beings. If a person done a physical activity then it's need more blood circulation then pulse rate increases.
The normal pulse rate or heart rate is 60-100 bpm, but when a person is sleeping their pulse rate became 40-60 bpm.
Therefore,The below mentioned levels shows the different structures of heart according to the given diagram:
Label A - Pulmonary Valve
Label B - Tricuspid Valve
Label C - Septum
Label D - Bicuspid Valve
Label E - Aortic Valve
Label F - Aorta
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Question 7 of 30
1 Point
DNA is made up of pairs of nitrogenous bases. Which of the following
nitrogenous bases is paired correctly?
O A. Adenine-guanine
O B. Guanine-guanine
O C. Guanine-cytosine
O D. Cytosine-thymine
SUBMIT
Answers
Answer:
C. Guanine-cytosine
Explanation:
As newts' poison became more toxic, the garter snake's resistance to it became more efficient. This is an example of
convergent evolution
coevolution
divergent evolution
adaptive radiation
Answers
Answer:
coevolution
Explanation:
As newts' poison became more toxic, the garter snake's resistance to it became more efficient. This is an example of coevolution.
what is the product of meiosis ii
Answers
The hero has something that sets her apart from others at the beginning. * A. The Temptation B. Crossing the Threshold C. An Unusual Birth/Early Childhood D. The Return Home
Answers
Answer: c
Explanation: you can notice she is special unlike others she has something unic. btw this belongs to inglish clas not biology sorry to break it up to you
Answer:
The Answer is C.
Explanation:
It makes more sense than the other answers...right? look at it. see it now?
please help
don't give irreverent answer
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Answer:
idk why u askin boo
Question 16 of 25
2 Points
A toad that escapes into an ecosystem with other toads that it outcompetes
is an example of a(n)
O A. keystone species
O B. extinct species
O c. invasive species
O D. introduced species
Answers
Answer:
C
Explanation:
Invasive species are usually species that enter an environment and cause destruction to the food chain, biodiversity, and the overall way of life. The toad outcompeteing the frogs that are supposed to be in the environment suggest it's an invasive species.
An introduced species would be if the toad was purposely introduced to the environment, which it was not.
