Adenine and Thymine invariably base pair with Cytosine and Guanine in DNA. These pairings take place because of the geometry of the bases, which only permits hydrogen bonds to form between certain pairs. While cytosine and guanine will make three hydrogen bonds, adenine and thymine will only form two.
Only in DNA may adenine and thymine be paired as bases. The two nitrogenous bases are joined by two hydrogen bonds. One of the hydrogen bonds is created between the oxygen atom of the keto group at C-4 of thymine and one of the amino group's hydrogen atoms at C-6 of adenine.
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Which percentage of DNA would indicate the organisms are more closely related?
A. 30%
B. 10%
C. 20%
D. 95%
Answer:
D
Explanation:
i am sorry if it is wrong
What are some potential
drawbacks of genetically-
modifying organisms?
Answer:
1. Allergic reactions. Some people believe that GMO foods have more potential to trigger allergic reactions.
2. Cancer.
3. Antibacterial resistance.
4. Outcrossing.
Explanation:
what is an example of simple sugar
Answer:
fructoseglucosegalactoseExplanation:
Simple sugars are carbs with one (monosaccharide) or two (disaccharide) sugar molecules.
They are commonly found in nutritious whole fruits, syrups, and honey.
Apply Concepts Eventually, most people with Alzheimer's disease lose the ability to recognize common objects. Explain which lobe is affected at this point in the disease
Answer:
The right temporal lobe
Explanation:
The cerebral cortex of the brain has two sections known as hemispheres, and each hemisphere can be divided into four lobes: frontal, parietal, temporal and occipital. Alzheimer's disease is the most common cause of dementia, which is characterized by the damage of the temporal lobe. Alzheimer’s disease usually initiates in the hippocampus, which is a structure inside each temporal lobe. The temporal lobes are involved in different neuronal functions: object recognition, face recognition, perception, memory, language, emotions, etc. The right temporal lobe is mainly involved in processing visual information (i.e., face recognition, object recognition, familiar recognition).
What is the water table?
Answer:
C: The top of a saturated aquifer
Explanation:
The water table is the upper surface of the zone of saturation. This zone of saturation is where pores and fractures of the ground get saturated with water. It can also be simply explained as, the upper level, below which the ground is saturated.
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Which of the following is a result of artificial selection? (4 points)
Animals with beneficial traits in a given environment survive.
Beneficial traits are selected based on the environment.
Individuals with beneficial adaptations reproduce more and pass traits on to offspring.
Crops and livestock animals bear little resemblance to wild ancestors.
Answer:
Beneficial traits are selected based on the environment.Explanation:
The Bloodhound dog breed was bred in the middle ages for an excellent sense of smell to be used for hunting.
Using the information in the table below, determine the amino acid
sequence
that is coded for by this mRNA sequence.
Answer:
You just have to look at the letters and figure it out. It's pretty simple
Explanation:
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How could the Galapagos finches have evolved into 13 different species ? (2-3 sentences)
Please help thanks
Answer:
they adapted to their environment, some have sharper beaks which are used to crack nuts, when they were introduced to the new environment they evolve to the new surroundings in order to survive. therefore, seeing as though there is 13 different species, the Galapagos islands have many different food sources, and ecosystems.
Explanation:
How many lights were used...
Answer:b
Explanation:
This cell will have long thin branches that can reach out to other cells, allowing the cells
to (send signals) be affected by and affect this cell.
what cell is this?
Answer:
Nerve cells
Explanation:
Part of the nervous system which is capable of communicating messages to others cells via electrical signals
Explain how colonial organisms may have evolved into eukaryotic cells.
Answer:
The hypothesis that eukaryotic cells evolved from a symbiotic association of prokaryotes—endosymbiosis—is particularly well supported by studies of mitochondria and chloroplasts, which are thought to have evolved from bacteria living in large cells.
2. People with diabetes must give themselves insulin injections after they eat - how does
this help them?
Explanation:
for the insulin to be able to act on the food particles. Providing the body with the correct proportion of energy so that the remainder could be strored for a later use
For this structural characteristic, decide if it is a characteristic of DNA, a characteristic of RNA, a characteristic of both or a characteristic of neither? It contains thymine as a base
Answer:it is a characteristic of DNA
Explanation:
Deoxyribonucleic acid(DNA) is made 5 carbon deoxyribose sugar, phosphate group,Nitrogenous base which include purine and pyrimidine. Purine base compose of Adenine and guanine while pyrimidine base compose of Cytosine and thymine.
In Ribonucleic acid (RNA) we have 5 carbon ribose sugar, phosphate group and nitrogenous bases which are purine and pyrimidine. Purine consist of Adenine and guanine while pyrimidine compose of Cytosine and Uracil where thymine in DNA is replaced by Uracil in RNA. This makes Thymine a components of DNA not RNA.
The difference between a dipeptide and a polypeptide?
A dipeptide consists of two amino acids linking together. A polypeptide is more than two amino acids linking together. Polypeptides are long chains with numerous but undefined numbers of amino acids.
Ferns reproduce by making a huge number of spores. How does this help the ferns survive?
It allows the ferns to absorb moisture from other plants.
It increases the chance of new ferns growing.
It keeps the ferns from drying out in hot weather.
It makes the ferns live shorter life cycles.
Answer: Ferns don't grow very with so with more spores it increases the chances of ferns growing.
Explanation: I did a test and got it correct.
Answer:B
Explanation:
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Explain how Earth's atmosphere has changed over time.
Answer:
It describes changes in the state of the atmosphere over time scales ranging from decades to millions of years. These changes can be caused by processes inside the Earth, forces from outside (e.g. variations in sunlight intensity) or, more recently, human activities.
Explanation:
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Scott was looking at the results of a cross between red and white flowers. Which is the most likely result of a cross that demonstrates incomplete dominance?
Answer:50 red flowers
Explanation:
Which answer best identifies the difference between the two types of cellular transport? (B.4B) Question 3 options: Active transport uses ATP to move molecules against the concentration gradient. Facilitated diffusion uses ATP to move molecules down the concentration gradient. Diffusion move molecules through the cell membrane from an area of low to high concentration. Active transport uses ATP to move molecules against the concentration gradient. Active transport uses ATP to move molecules against the concentration gradient. Facilitated diffusion does not need ATP, but uses protein channels to move molecules down the concentration gradient. Facilitated diffusion does not need ATP, but uses protein channels to move molecules down the concentration gradient. Active transport uses ATP to move molecules down the concentration gradient.
Answer:
Active transport uses ATP to move molecules against the concentration gradient.Facilitated diffusion does not need ATP, but uses protein channels to move molecules down the concentration gradientExplanation:
Transmembrane proteins, among others, are the channel proteins and the carrier proteins, and they are in charge of substances transport into or out of the cell.
Channel proteins are involved in passive transport, and facilitated diffusion is a kind of passive transport. Facilitated diffusion transport hydrophilic molecules that can not freely move through the membrane. Channel proteins carry them from one side to the other of the membrane, following the electrochemical gradient, so they do not need energy to carry in or out substances. Uncharged molecules´ movement depends on concentration gradients, while ions´ movement depends on an electrochemical gradient.Carrier proteins are involved in active transport. Active transport acts against the electrochemical gradient, so it does need the energy to transport substances. It carries molecules from a low concentration side to a high concentration side. The used energy comes from ATP (Na-K bomb) or the membrane´s electric potential.
Which organelle converts energy from nutrients?
A. Ribosome
B. Vacuole
C. Nuclues
D. Mitochondria
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Answer:
ç.
Explanation:
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The term that describes the allele that determines the phenotype of an individual organism when two different copies are present in the genotype is?
A. Recessive
B. Nucleus
C. Dominant
D. Eukaryotic
Answer:
A. Recessive
Explanation:
Only answers A and C can be used to describe an allele, so B and D can't be it. If the allele was dominant, only one copy would be necessary for the phenotype to be expressed (ex. heterzygous green peas are still green, even though they carry a yellow allele). Therefore, since 2 copies are present for this phenotype, it must be recessive.
Which of the following statements is correct?
A. Landfills solved pollution problems caused by waste disposal.
B. Wastewater from cities no longer carries toxic chemicals into waterways.
C. Laws regulating waste disposal have put an end to pollution problems caused by waste.
D. Much of the pollution in our environment is a byproduct of inadequate waste disposal.
Answer:
D
Explanation:
all the others are false
Much of the pollution in our environment is a byproduct of inadequate waste disposal, hence option D is correct.
What are the problems of waste disposal?There are some problems caused by solid waste disposal include: finding suitable landfill locations, groundwater pollution, and soil pollution.
Landfills have not solved pollution problems caused by waste disposal, because it creates soil pollution in the area where waste is disposed of, which decreases the fertility of the soil.
Wastewater from cities carries toxic chemicals into waterways, which is the major cause of water pollution in that area. There are some laws that regulate pollution, but not all the person follows them.
Therefore, waste disposal is the major factor of pollution.
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What did you include in your response? Check all that apply Longitudinal and transverse waves are mechanical waves, so they both carry energy through particles of matter. Longitudinal waves are waves that transfer energy parallel to the direction of wave motion. Transverse waves are waves that transfer energy perpendicular to the direction of wave motion.
Answer:
Longitudinal waves are waves that transfer energy parallel to the direction of wave motion.
Transverse waves are waves that transfer energy perpendicular to the direction of wave motion.
Explanation:
First of all, transverse waves are not mechanical waves at all. Longitudinal waves are mechanical waves.
Longitudinal waves are waves that transfer energy parallel to the direction of wave motion. A typical example of longitudinal waves is wave on a spiral spring.
Transverse waves are waves that transfer energy perpendicular to the direction of wave motion. A typical example of a transverse wave is light wave and other electromagnetic waves.
Look at the diagram.
Which two structures are first to combine in translation?
20004
• 1 and 2
• 3 and 4
• 2 and 3
• 1 and 4
Answer:
2 and 3
Explanation:
which are the tRNA with anticodons and the amino acids
PLEASE HELP
Which of the following increases genetic variation by forming entirely new alleles?
Natural selection
Genetic drift
Mutation
Gene flow
Answer:
Mutation, forms entirely new alleles, the other answer choices change preexisting allele distribution within the population.
Answer:
mutation should be the answer
If you draw a card out of a deck of cards at random,
what is the probability that you will draw a 6 of
hearts?
A. 4:52
B. 1:1
O C. 1:52
O D. 6:52
SUBMIT
Answer: C. 1:52
Explanation:
Alec saw footage of a landslide on the news. He saw rocks falling from the side of a mountain, with some of them smashing into each other and breaking apart. Select two of the processes Alec witnessed.
A
cementing
B
compacting
C
erosion
D
sedimentation
E
weathering
F
deposition
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10. Using the DNA Code below, create mRNA and the tRNA codes:
ACG ACG G C ATTAC AG GTA ACG CC
Answer:
mRNA - UGC UGC C G UAAUG UC CAU UGC GG
Explanation:
tRNA - ACG ACG G C AUUAC AG GUA ACG CC
Where does fertilization take place?
A. ovary
B. style
Answer:
A. ovary
Explanation:
It takes place in a fallopian tube that links an ovary to the uterus.
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names for mutant animals (like fantasy help pls)
Answer:
‘Henry,’ The Hexapus
‘Octogoat,’ The Eight-Legged Goat
Faith,’ The Two-Legged Dog
We,’ The Two-Headed Albino Rat Snake
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