How does this data provide evidence for base pairing in dna
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Answer:
There are chemical cross-links between the two strands in DNA, formed by pairs of bases. They always pair up in a particular way, called complementary base pairing: thymine pairs with adenine (T–A) guanine pairs with cytosine (G–C)
Explanation:
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Related Questions
How many grams of kclo3 can be dissolved in 100 grams of water at 30 degrees Celsius
2. When lithium reacts with bromine to form the compound LiBr,each lithium atom1) gains one electron and becomes a negatively charged ion2) gains three electrons and becomes a negatively charged ion3) loses one electron and becomes a positively charged ion4) loses three electrons and becomes a positively charged ion
Which statements about the formation of the solar system are true and in a correct order? A. A black hole collapsed to form the sun; small planetary objects formed; small planetary objects collided with each other to form larger objects. B. Most of the dust and gas contracted into a central mass—the Sun; half the mass of the cloud condensed to form Jupiter; asteroids and comets crashed into the sun to form the smaller planets. C. A spinning cloud of dust began to compress to form the sun; small planetary objects formed; hydrogen and helium became concentrated in the outer solar system to form the outer planets. D. Gravitational force held the newly formed planets around the sun; small planetary objects formed; hydrogen and helium became concentrated in the outer solar system to form the outer planets.
If atoms are made of smaller parts such as electrons, why are atoms considered the basic unit of matter?
2 - The nucleus of an atom is split apart.
3 - An atom gains an electron from another atom.
Which reaction(s) most likely release the greatest amount of energy?
1
2
1 and 3
2 and 3
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Answer: Option (b) is the correct answer.
Explanation:
When an atom shares electrons with another atom then it results in the formation of covalent bond.
Whereas when an atom transfer electrons from one atom to another then it results in the formation of ionic bond.
When nucleus of an atom splits then it represents nuclear fission reaction and energy is released during this process.
For example,
Therefore, we can conclude that out of the given options, the nucleus of an atom is split apart most likely release the greatest amount of energy.
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Transmission Electron microscope (TEM):a beam of electrons is passed through a thin section of specimen that is stained with atoms or heavy metals and electromagnets acts as lenses that focus the image onto a screen or film. It is used to study the internal structure of a specimen--cells
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Answer:
Yes, this reaction will be spontaneous.
Explanation:
A reaction is spontaneous if ΔG < 0.
The coupling of glycerol to glycerol-3-phospate with ATP gives:
glycerol + HPO₄²⁻ ⟶ glycerol-3-phosphate + H₂O ΔG = +9,2 kJ/mol
ATP + H₂O ⟶ ADP + HPO₄²⁻ ΔG = -30,5 kJ/mol
glycerol + ATP ⟶ ADP + glycerol-3-phosphate
ΔG = +9,2 kJ/mol - 30,5 kJ/mol = -21,3 kJ/mol
As ΔG<0, this reaction will be spontaneous
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Answer;
Yes; this reaction be spontaneous if coupled with the hydrolysis of ATP.
Explanation;
The reaction converting glycerol to glycerol-3-phosphate (energetically unfavorable) can be coupled with the conversion of ATP to ADP (energetically favorable):
Glycerol + HPO42 ⟶glycerol-3-phosphate+H2O
ATP + H2O⟶ ADP + HPO42− + H+
a. Número de protones _______________
b. Número de electrones _______________
c. Número de neutrones _______________
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Answers
by changing the subject of formula, x = 0.1L × 8M = 0.8mol
given the no. of mol of KNO3, mass of KNO3 is given by no. of mol multipled by the relative molecular mass of KNO3.
mass = 0.8mol × 101.10g/mol (or whatever your periodic table says) = 80.88g
According to the electronegativity difference between the atoms in carbon dioxide, it would be appropriate to label oxygen with the symbol, _______, and carbon with the symbol, _______.
Based on the electronegativity difference between carbon and hydrogen, the bonds in methane are _______.
According to the electronegativity difference between the atoms in methane, it would be appropriate to label hydrogen with the symbol, _______, and carbon with the symbol, _______.
Answers
In water molecule, oxygen is more electronegative than hydrogen.
The difference in electronegativity signifies that the hydrogen-oxygen bond is polar in nature i.e. partial positive and partial negative.
According to the electronegativity difference between the atoms in water, it would be appropriate to label hydrogen with the symbol partial positive(Hδ+) and oxygen with the symbol partial negative(Oδ-.) due to attraction of electron pair.
Based on the electronegativity difference between carbon and oxygen, the bonds in carbon dioxide are polar in nature means they making poles.
According to the electronegativity difference between the atoms in carbon dioxide, it would be appropriate to label oxygen with the symbol partial negative(Oδ-) and carbon with the symbol partial positive(Cδ+).
Based on the electronegativity difference between carbon and hydrogen, the bonds in methane are polar because of different values of electronegativity.
According to the electronegativity difference between the atoms in methane, it would be appropriate to label hydrogen with the symbol partial positive(Hδ+) and carbon with the symbol partial negative(Cδ-.).
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polar
plus delta
negative delta
polar
negative delta
positive delta
polar
positive delta
negative delta
negative delta are the more electronegative molecules
positive delta are the least electronegative molecules
polar because they have differing electronegativities