Answer:
what do you mean i don't understand
Premed students are often traumatized by studying for their MCAT exam, which historically was always taken at the end of their Junior year in college. Now, many medical schools desire a meaningful gap year between completion of an undergrad degree and entrance to medical school so that incoming students have some sort of life-time experience either working, doing research, charity outreach, or traveling during that time. As a result, modern pre-med students often wait to study for their MCAT until after they graduate without realizing that it means they will end up taking two gap years, not one. Students who complete a basics genetic course should be confident with their knowledge about DNA, RNA, and proteins, along with how to solve basic inheritance problems, which will help them on their MCAT exams. Introductory Genetics helps to reinforce concepts taught fleetingly in Introductory Biology.
1. Jiro is told that a bacterium contains a single DNA chromosome containing 15% guanine and then is asked to decide if the organism is âGCâ rich or not (>50% G-C content = 'rich')). With full confidence, Jiro responds:
A.Heck no! The strand has a GC content of 30%.
B.Heck yeah! The strand has a GC content of 70%.
C.Heck no! The strand has a GC content of 15%.
D.It contains exactly 50% GC content.
2. If Marisol isolates 15% guanine from a strand of DNA, she can say with full confidence that:
A.the strand is made up of 70% pyrimidines.
B.the strand is made up of 30% pyrimidines.
C. the strand is made up of 50% pyrimidines and 50% purines.
D.the strand is made up of 70% purines.
3. Jayson is asked if a strand of DNA that is GC-rich will be harder to separate than one that is GC-poor. He responds with full confidence:
A. No!
B.Yes!
C. This question is irrelevant since double-stranded DNA is always easy to separate due to the hydrogen bonds that hold them together.
D.After 150 years of research into DNA, no one knows the true answer to this question.
Answer:
1. A
2. C
3. B
Explanation:
1. The DNA here has a Guanine(G) content of 15% and as G is equal to C,
[tex]$GC=G+C$[/tex]
= 15% + 15%
= 30%
As the GC content is less than 50 % , so the DNA is not a GC rich DNA. Therefore, for a DNA to be GC rich in content, G+C should be more than 50%.
Therefore the correct option is (A), The strand has a GC content of 30%.
2. With a content of 15% Guanine, we calculate the proportions of the four bases. They are :
[tex]$A+T=G+C$[/tex] and [tex]$A=T, G=C$[/tex]
∴ [tex]$A+T=15\% +15\%$[/tex]
[tex]$=30\%$[/tex]
So when we substract 30% from 100% , we get 70%. Now this 70% is then distributed in the equal proportions for [tex]$A$[/tex] and [tex]$T$[/tex].
Therefore, we have:
[tex]$A=30\%, T=35\%, G=15\%$[/tex] and [tex]$C=15\%$[/tex]
Therefore we calculate the content of purines [tex]$(A,G)$[/tex] and pyrimidines [tex]$(C,T)$[/tex].
Purine content : [tex]$A+G = 35\% + 15\%$[/tex]
[tex]$=50\%$[/tex]
Pyrimidine content : [tex]$C+T=15\%+35\%$[/tex]
[tex]$=50\%$[/tex]
Therefore, the correct option is (C).
3. Yes, the GC rich strand of the DNA is more stable the a GC low content DNA. But this stability is not due to the hydrogen bonds, it is mainly due to the stacking interaction known as base stacking.
So the correct option is (B).
FIRST CORRECT GETS BRAINLIEST
Just ask 3-5 questions about climate change
Is the Sun causing global warming?
Is there a possible way to stop climate change?
Do scientists agree on climate change?
If there is a possible way to stop climate change, why don't we change it?
What do volcanoes have to do with climate change?
Answer:
What is the greenhouse effect?
Is it too late to prevent climate change?
What causes climate change?
Has the earth continued to warm since 1998?
Is it the ozone hole that causes climate change?
1 pts
Use your table of the genetic code to determine the amino acid that would be attached to the 3' end of
this molecule.
Answer:
AUG start codon methionine
Explanation:
I need this ASAP please i might fail
What is the complementary strand of DNA for the polymer ATTCGCAT?
O TAACGCTA
O TAAGCGTA
O ATTCGCAT
O CGGATACG
Answer:
TAAGCGTA
Explanation:
Chef Brandi suffered a bum on her arm when a kettle of spaghetti sauce exploded. The doctor, using a forceps, pulls on a hair within the
area that is burned. The hair easily pulls out. What degree of burn did the patient have?
Answer:
2degree burn
Explanation:
it has moist layer of skin and it affects the outer and middle layers of your skin the hair is present in human body . hope you find it useful
The tall wetland plant, purple loosestrife, was brought from Europe to the
United States in the early 1800s as a garden plant. The plant's growth is now
so widespread across the United States that it is crowding out a number of
native plants. This situation is an example of
Answer: an unintended effect of adding a species to an ecosystem.
What is the answer to this question 11
Answer:
11 = multicellular ; autotroph
option D
hope it helps
if a mother has the following alleles for a gene - Bb - what would her gametes look like?
Answer:
half of the gametes would have B and the other half would have b
Explanation:
What are your top 3 favorite lifeforms and why? What adaptations help these living things to survive in their environment?
please help
I will give brainliest for the best answer
Answer:
so it's saying what are your favorite animals or plants or living things and how do they survive
hi!! here's ur answer!!
my top 3 favourite lifeforms are- polar bears,tigers and ducks. :D
1) polar bears- are well adapted for survival in the Arctic. Their adaptations include: a white appearance - as camouflage from prey on the snow and ice. thick layers of fat and fur - for insulation against the cold.
2) tigers- striped coat helps them blend in well with the sunlight filtering through the treetops to the jungle floor. The tiger's seamless camouflage to their surroundings is enhanced because the striping also helps break up their body shape, making them difficult to detect for unsuspecting prey.
3) ducks- possess an oily coating that keeps water from settling in their feathers, helping them in staying dry and keeping themselves warm. Their webbed feet, designed like paddles, provide more surface area to push against the water and help them swim.
hope it helps:)
what is the answer to 2x9?
Answer:
the answer to 2x9 equals 18
Answer:
18
Explanation:
you subtract two from 20
Explore the three different types of ground tissue cells in detail and complete the chart below.
Answer:
parenchyma have primary cell walls (thin) and are unspecialized and metabolically active (photosynthesis, respiration)
collenchyma have primary cell walls (unevenly thick) which provide a level of structural support in areas of high growth, they are alive so have a protoplast
sclerenchyma have secondary cell walls which means they have lignin and are thick, they are functionally dead at maturity so provide support in areas that are done growing and are involved in transport of water
Explanation:
Which statement best describes the hydrosphere?
A it includes only the water on the Earth's surface
B It includes only freshwater on the Earth's surface
C It includes water on the Earth's surface, underground, and in the atmosphere
D It includes fresh and salt water on the Earth's surface and underground
Answer: C
Explanation:
What could explain the curve in this population growth graph?an unlimited food supply
a natural disaster
a population crash
a reduction in predators
Answer:D
Explanation:
The curve in this population growth graph indicates an unlimited food supply, which is the first option, as an unlimited food supply could explain a steady or exponential increase in population size without a curve.
What is population growth?Population growth is a measure of the change in population size over time, and it is affected by many factors, including the availability of resources, predation, disease, natural disasters, and human activities. The shape of a population growth graph can provide important insights into the underlying factors that are influencing the population. An unlimited food supply would allow a population to grow without any limitations. In this scenario, the population would experience a steady or exponential increase in size, and the graph would show a straight line or a curve that rises steeply. However, even with unlimited food, other factors, such as competition for resources, predation, or disease, may eventually limit the population's growth.
Hence, the curve in this population growth graph indicates an unlimited food supply, which is the first option.
Learn more about population growth here.
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If two O blood group parents get married what is the probabilty of getting a baby with A blood group?
A. 100%
B. 0%
C.50%
D. 25%
Answer:
B. 0%
Explanation:
It is nearly impossible for two O blood parents to have a baby with an A blood type. This is due to no A or B blood to combine with in the gene pool.
Explain the three mechanism for how activated transcription factors can stimulate transcription through modification of the chromatin structure.
What is the body's first line of defense against infection by foreign organisms? antibodies lymph nodes white blood cells the skin
Answer:
White blood cells
Answer:not white blood cells
Explanation:
After plants first moved to land, what happened?
A.
Plants evolved into multicellular organisms.
B.
Adaptive radiation formed many new land plant species.
C.
Photosynthesis evolved as a way to produce energy.
D.
They adapted by developing cuticles.
Answer: B. Adaptive radiation formed many new land plant species
Explanation:
After plant first moved to land adaptive radiation formed many new land species
What is adaptive radiation?"Adaptive radiation is a process in which organisms diversify rapidly from an ancestral species into new species due to change in the environment."The species adapt themselves to varied habitat in order to survive and the number of species increases.What is species?"It is a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding."Hence, the correct option is B. Adaptive radiation formed many new land plant species.
To know more about adaptive radiation here
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are humans multicelluar organism or unicellular organism
Answer:
multicellular
Explanation:
Give the types of bacteria.
4.
Which of the following is not a negative impact of invasive species?
A.
There is decreased competition with native species.
B.
Native species are crowded out or replaced.
C.
The carrying capacity of the habitat is decreased.
D.
There is increased competition with native species
HELLLLPPPPPPPPPPPLEASEEE
Jessica learns that two organisms are members of the same class. Which can she also infer is true?
The organisms are members of the same order.
The organisms are members of the same family.
The organisms are members of the same genus.
The organisms are members of the same phylum.
answer:
The organisms are members of the same family.
this is the answer.
Identify an organism that the giant tortoise competes with
Answer:
Threats
Explanation:
The giant tortoise is threatened by introduced species to the islands, such as dogs and cats which prey on young tortoises, and cattle which compete for grazing vegetation.
the role of _________ is to break down dead organisms, returning nutrients to the soil.
Answer: Decomposers
Explanation: Decomposers break down dead and decaying organisms, and return the nutrients to the soil for the plants.
Studying the embryology of animals provides important evidence to support claims of shared evolutionary history. What feature of embryology makes it capable of providing data for common evolutionary history not readily available from other sources?
A)As the embryo develops, it reveals the expression of genes.
B)The growth of the embryo is achieved by differentiation of cells.
C)A developing embryo exhibits structures not present in the adult animal.
D)The development of embryos of a certain species is consistent.
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Choose the correct answer.
The process of removing all the unwanted matter from sheared wool of an animals called ?
a) Carding
b) Grading
c) Scouring
d) Drying
2.which of the following leaves do Bombyx mori L silkworms feed on ?
a) mulberry
b) neem
c)mapple
d)all of these
Answer:
answer 1 shearing
answer 2 mulberry
From the time a baby is born, what is she or he eager to do?
A. Explore her world and interact with others
B. Smile at her parents and primary caregivers
C. Sleep the majority of the time
D. Play with her parents, primary caregivers, and toys
Answer:
D. Play with her parents, primary caregivers, and toys
Answer:
D. Play with her parents, primary caregivers, and toys
Explanation:
label the following parts of an animal cell
What is the main source of energy for the world
Surface water currents are important because they_________
Answer:
Surface currents are extremely important because they distribute heat around the planet and are a major factor influencing climate around the globe.
Explanation:
Ocean currents flow like vast rivers, sweeping along predictable paths. Some ocean currents flow at the surface; others flow deep within water. Some currents flow for short distances; others cross entire ocean basins and even circle the globe.
By moving heat from the equator toward the poles, ocean currents play an important role in controlling the climate. Ocean currents are also critically important to sea life. They carry nutrients and food to organisms that live permanently attached in one place, and carry reproductive cells and ocean life to new places.Major surface ocean currents in the open ocean, however, are set in motion by the wind, which drags on the surface of the water as it blows. The water starts flowing in the same direction as the wind.
But currents do not simply track the wind. Other things, including the shape of the coastline and the seafloor, and most importantly the rotation of the Earth, influence the path of surface currents.