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).
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 California Mussel ( Mytilus californianus ) is the natural prey of the shore crab ( Carcinus maenas ). Study the graph above. Why would a crab adapt to having larger claws according to the graph?
a. Larger claws would help the crab camouflage in the rocks so the mussels won’t see them.
b. Larger claws would help the crab swim fast in a rough current toward where the mussels are hiding.
c. Larger claws would help the crab crack open the shells of the mussels so the crab can eat them.
d. Larger claws would scare away the mussels with thicker shells causing the crabs to choose a new food source.
Answer:
The correct answer is - c. Larger claws would help the crab crack open the shells of the mussels so the crab can eat them.
Explanation:
The graph (attached) states that the two variables size of claws of the crabs depends on the thickness of the shell of mussels. With the increase in the thickness of the shell of the mussels the size of the claws of crabs also increases and becomes larger.
The most likely explanation of this change would be adapting according to the change in the shell of the crab as they require to crack their shell to eat them as mussels are the primary food source of these crabs.
Which organelle is like the brain of the cell? vacuole O endoplasmic reticulum O cytoplasm O nucleus
Answer:
nucleus
Explanation:
i remember this from science.
Nucleus is the main control center of the Cell.
Many Learners Perform Well In Grade 12 But still not accepted into Universities.Explain Two Reasons For This
Answer:
1. Confusion
2. Financial issue
Explanation:
1. The reason I say this is that many of them are not really sure about what they want they want to do in their later future making them a little confused on what to do.
2. It is a common issue which has taken away so many bright minds away from their future in helping the world and their individual community to prosper in different ways.
The reason why many students from grade 12 are not accepted in universities is that they may not be ready to pursue a given career or their parents may not be able to afford it.
Why are grade 12 students not accepted in universities?In the whole of North America, grade 12 is the senior class or the highest class in high school.
Some grade 12 students may not be admitted into university even though they performed well because;
Some of the students who have finished well in grade 12 do not yet have clear cut career orientations.Also, some of them may not have parents that can afford to send them to the university.Hence, a good performance in grade 12 do not guarantee university admission.
Learn more about grade 12: https://brainly.com/question/11958048
Suppose your friend investigated the color of pea pods and concluded that green pods (G) were dominant over yellow pods (g). What experimental evidence would be needed to support this conclusion?
Why does DNA make a copy of itself during cell division?
A. To make sure that the two new cells can make the same proteins
as the parent cell
B. To make sure that the two new cells have slightly different genetic
codes
C. To carry amino acids out of the nucleus
D. To expose the genes that code for the needed proteins HELP FAST
Answer:
its A
Explanation:
I took the test
I need this ASAP please i might fail
Explain the three mechanism for how activated transcription factors can stimulate transcription through modification of the chromatin structure.
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:
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.
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:)
In garden peas, tall (T) vine is dominant over short (t) vine, and round pea pod (R) is dominant over wrinkled pea pod (r). Cross an h0m0zygous tall, round pea plant with an h0m0zygous short, wrinkled pea plant. Show the genotypes and phenotypes of the F1 offspring and the probability of each.
__________ Genotype of the h0m0zygous tall, round pea plant
__________ Genotype of the h0m0zygous short, wrinkled pea plant.
Answer:
TtRr - 100%
Explanation:
This question involves two different genes in pea plants. One gene is coding for height and the other for pea shape. The allele for tallness (T) and round (R) pea is dominant over the allele for shortness (t) and wrinkled (r) peas.
According to this question, an h0m0zygous tall, round pea plant (TTRR) is crossed with an h0m0zygous short, wrinkled pea plant (ttrr). The following gametes will be produced by each parent:
TTRR - TR, TR, TR, TR
ttrr - tr, tr, tr, tr
Using these gametes in a punnet square (see attached image), the following proportion of offsprings is produced in the F1 generation: All or 100% TtRr
TtRr will be phenotypically tall and round.
CAN YOU HELP MD PLEASEEE ITS BIOLOGY!!! THANK YOUUU
Answer:
yeah of course
1 ) answer is protist
2) Eubacteria
3) Animal
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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what is the definition of soluble?
Answer:
soluble means that it is capable of being dissolved in water
Explanation:
Answer:
able to be dissolved, especially in water.
Explanation:
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 of the following courses would NOT be part of the curriculum for someone studying to be a botanist? Native Flora Native Fauna Exotic Dendrology Plant Systematics
Answer: The correct answer is Native Fauna
Explanation: This answer has been confirmed correct.
Native Fauna refers to animals.
What is the answer to this question 11
Answer:
11 = multicellular ; autotroph
option D
hope it helps
Which two atoms form an ionic bond?
A. Sodium and bromine
B. Two oxygen atoms
C. Two sodium atoms
D. Fluorine and chlorine
Some dog foods contains corn and wheat that provide the dog with carbohydrates. Which claim explains why carbohydrates are important to cell processes? Group of answer choices They make amino acids. They form cell membranes. They help chemical processes happen. They are a source of energy.
Answer:
they are the sourse of the energy
Explanation:
What is the main source of energy for the world
Which of these is a downside of natural gas?
Answer:
B, extraction through fracking can contaminate groundwater.
Explanation:
Well, it's really the only downside available. Hope this helps :)
Antibodies are composed of two types of peptides, heavy chains and light chains. One of the major classes of antibody molecules is immunoglobulin G (IgG). Two heavy chains and two light chains form one IgG molecule. Classify each statement as describing the heavy chains, light chains, or both chains of IgG
a. form the antigen-binding site
b. contain multiple variable domains
c. are found in the Fab fragment
d. are found in the FC fragment
e. contain only one constant domain
f. contain multiple constant domains
g. contain only one variable domain
Answer and Explanation:
a. form the antigen-binding site ⇒ both chains
The antigen-binding site is formed by one hypervariable region of the light chain (VL) and one hypervariable region of the heavy chain (VH). So, both type of chains contributes to antigen recognition.
b. contain multiple variable domains ⇒ none
Both chains - light and heavy - contain only one variable domain (VL and VH).
c. are found in the Fab fragment ⇒ both chains
The Fab fragment is composed of portions of both light and heavy chains: each portion contains one variable domain and one constant domain. The Fab fragment binds specifically the antigen.
d. are found in the FC fragment ⇒ heavy chains
The Fc region is composed of portions of heavy chains (CH² and CH³), so it contains constant domains.
e. contain only one constant domain ⇒ light chains
Each light chain contains one variable domain (VL) and one constant domain (CL).
f. contain multiple constant domains ⇒ heavy chains
Each heavy chain contains three constant domains: CH¹, CH² and CH³.
g. contain only one variable domain ⇒ both chains
Both light and heavy chains contain one variable domain. The difference is given by the number of constant domains: light chains have 1 constant domain while heavy chains have 3 constant domains.
I have no idea what the answer is but ill give points for CORRECT answers only!!!
Answer:
A
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.
https://brainly.com/question/19138982
#SPJ7
Plss help me with this carbon cycle!!!!
Answer:
Plants photosynthesize, so they need, thus absorbs carbon dioxide. Marine plants also need carbon dioxide for photosynthesis so they absorb. Dead plant and animal matter decay to release carbon dioxide as a result.
A carbon footprint refers to the greenhouse gas emissions caused both directly, and indirectly, by an individual, a product, an organization, or an event.
does atoms of the same elements have the same number of pruton
Answer:
all atoms of element have the same amount of protons
Explanation:
1. which of the following organisms is not a strepsirrhines?
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.
Can animals perform
photosynthesis?
No
Yes
Answer:
No
Explanation:
animals are heterotrophic meaning they can't produce their own food.