1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
s344n2d4d5 [400]
3 years ago
12

Which one of the following statements is correct? View Available Hint(s) Which one of the following statements is correct? Adeni

ne forms two covalent bonds with thymine; guanine forms three covalent bonds with cytosine. Adenine forms three covalent bonds with thymine; guanine forms two covalent bonds with cytosine. Adenine forms three hydrogen bonds with thymine; guanine forms two hydrogen bonds with cytosine. Adenine forms two hydrogen bonds with thymine; guanine forms three hydrogen bonds with cytosine. Adenine forms two hydrogen bonds with guanine; thymine forms three hydrogen bonds with cytosine.
Chemistry
1 answer:
Dmitrij [34]3 years ago
4 0

Answer:

Adenine forms two hydrogen bonds with thymine;

guanine forms three hydrogen bonds with cytosine

Explanation:

There are three hydrogen bonds between guanine and cytosine. Between adenine and thymine, two hydrogen bonds form. Complementary pairs always include one base of purine and one base of pyrimidine.

You might be interested in
Calculate total ATP produced from a fatty acid of 32 carbons
emmasim [6.3K]

Answer:

Total number of ATP molecules generated from a 32-carbon fatty acid = 206 ATP molecules

Explanation:

A 32 carbon fatty acid which undergoes complete beta-oxidation assuming that the fatty acid is fully saturated will pass through the beta-oxidation cycle 14 times to produce the following:

15 molecules of acetylCoA, 14 molecules of FADH₂, and 14 molecules of NADH.

Each of the 15 acetylCoA molecules can be further oxidized in the citric acid cycle to yield the following: 15 × 3 NADH; 15 × 1 FADH₂, and 15 ATP molecules from the substrate level phosphorylation occuring at the succinylCoA synthetase catalyzed-reaction.

Total FADH₂ produced = 15 + 14 = 29 molecules of FADH₂

Total NADH produced = 45 + 14 = 59 molecules of NADH

The FADH₂ and NADH will each donate a pair of electrons to the electron transfer flavoprotein and mitochondrial NADH dehydrogenase respectively of the electron transport chain, and about 1.5 and 2.5 molecules of ATP are generated respectively when these electrons are transfered to molecular oxygen.

Thus, number of molecules of ATP generated by 29 molecules of FADH₂ = 1.5 × 29 = 43.5 molecules of ATP.

Number of molecules of ATP generated by 59 molecules of NADH = 2.5 × 59 = 147.5

Sum of ATP generated from FADH₂ and NADH = 43.5 + 147.5 = 191 ATP molecules

Total number of ATP molecules generated = 191 + 15 = 206 ATP molecules

Total number of ATP molecules generated from a 32-carbon fatty acid = 206 ATP molecules

7 0
3 years ago
Which of these elements has physical and chemical properties most similar to silicon (Si)?
siniylev [52]
In order from most to least similar:
1. Germanium
2. Lead
3. Phosphorus
4. Chlorine
The elements in the same column as the element you have are the most similar. The rows are not. For example, though chlorine and magnesium are in the same row, they have very different properties, whereas chlorine and fluorine more similar
6 0
3 years ago
Read 2 more answers
The following reaction shows the products when sulfuric acid and aluminum hydroxide react.
scoray [572]

Leftover: approximately 11.73 g of sulfuric acid.

<h3>Explanation</h3>

Which reactant is <em>in excess</em>?

The theoretical yield of water from Al(OH)₃ is lower than that from H₂SO₄. As a  result,

  • Al(OH)₃ is the limiting reactant.
  • H₂SO₄ is in excess.

How many <em>moles</em> of H₂SO₄ is consumed?

Balanced equation:

2 Al(OH)₃ + 3 H₂SO₄ → Al₂(SO₄)₃ + 6 H₂O

Each mole of Al(OH)₃ corresponds to 3/2 moles of H₂SO4. The formula mass of Al(OH)₃ is 78.003 g/mol. There are 15 / 78.003 = 0.19230 moles of Al(OH)₃ in the five grams of Al(OH)₃ available. Al(OH)₃ is in excess, meaning that all 0.19230 moles will be consumed. Accordingly, 0.19230 × 3/2 = 0.28845 moles of H₂SO₄ will be consumed.

How many <em>grams</em> of H₂SO₄ is consumed?

The molar mass of H₂SO₄ is 98.076 g.mol. The mass of 0.28845 moles of H₂SO₄ is 0.28845 × 98.076 = 28.289 g.

How many <em>grams</em> of H₂SO₄ is in excess?

40 grams of sulfuric acid H₂SO₄ is available. 28.289 grams is consumed. The remaining 40 - 28.289 = 11.711 g is in excess. That's closest to the first option: 11.73 g of sulfuric acid.

6 0
3 years ago
Which types of atomic orbitals of the central atom mix to form hybrid orbitals in:<br> (b) CS₂;
Anettt [7]

<u>One s orbital</u> and <u>one p orbital</u> are the exact types of atomic orbitals of the central atom mix to form hybrid orbitals in CS₂

<h3>What is atomic orbital?</h3>

An atomic orbital is a function used in atomic theory and quantum mechanics to explain the position and wave-like behaviour of an electron in an atom. This function can be used to determine the likelihood of discovering any atom's electron in any particular area surrounding the nucleus.

The physical area or space where the electron may be calculated to be present, as predicted by the specific mathematical shape of the orbital, is referred to as an atomic orbital.

The three quantum numbers n, l, and m_l which correspond to the electron's energy, angular momentum, and an angular momentum vector component, are used to describe all orbitals in an atom (magnetic quantum number).

Learn more about Atomic Orbital

brainly.com/question/20319149

#SPJ4

6 0
1 year ago
8) 4.00 mol HI are placed in an evacuated 5.00 L flask and then heated to 800 K. The system is allowed to reach equilibrium. Det
SVEN [57.7K]

Answer: Concentration of H_2 at equilibrium = 0.08 M

Concentration of I_2 at equilibrium =0.08 M

Concentration of Hl = 0.64M

Explanation:

Moles of  HI = 4.00 mole

Volume of solution = 5.00 L

Initial concentration of HI =\frac{moles}{Volume}=\frac{4.00mol}{5.00L}=0.8M

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as K_c

For the given chemical reaction:

         2HI(g)\rightarrow H_2(g)+I_2(g)

Initial conc.      0.8 M           0 M    0 M

   At eqm. conc.  (0.8-2x) M   (x) M   (x) M    

The expression for K_c is written as:

K_c=\frac{[H_2]^1[I_2]^1}{[HI]^2}

0.016=\frac{(x)\times (x)}{(0.8-2x)}

x=0.08M

Concentration of H_2 at equilibrium = x M = 0.08 M

Concentration of I_2 at equilibrium = x M = 0.08 M

Concentration of Hl = (0.8-2x) = (0.8-2\times 0.08)M= 0.64M

3 0
3 years ago
Other questions:
  • Which pair of properties describes the elements in Group 18?
    5·1 answer
  • The vapor pressure of pure water at 25 °C is 23.8 torr. Determine the vapor pressure (torr) of water at 25 °C above a solution p
    11·1 answer
  • An electron charge e mass m and a positron charge e mass m revolve around their common center of mass under the influence of the
    7·1 answer
  • Prepare a 0.50 L of a 1.0 M solution of potassium sulfate. Determine the amount of potassium sulfate needed in correct significa
    8·1 answer
  • Identify a conjugate acid-base pair in the reaction
    13·2 answers
  • What is an orbital?
    11·2 answers
  • What are community level basic proffesion under health sector?​
    9·1 answer
  • Use the periodic table to choose the correct name for each of the following substances. Check all tha
    7·1 answer
  • Atoms like sodium and lithium often lose electrons which makes them
    7·2 answers
  • Why has the acidity of the ocean increased over the years?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!