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
Fittoniya [83]
3 years ago
13

Hairpins often form at palindromic sequences in single strands of either RNA or DNA. However, several key features differentiate

the helical structure of an RNA and a DNA hairpin. Select the statements that describe the helical structure of an RNA hairpin.
A) The hairpin adopts a right-handed helix with a diameter of 20 Å .

B) The pentose in the hairpin adopts only the C-3\' endo pucker conformation.

C) The hairpin adopts a right-handed helix with a diameter of 26 Å .

D) The hairpin contains G:C, A:U, and sometimes G:U base pairs.

E) The pentose in the hairpin adopts either the C-2\' or the C-3\' endo pucker conformation.
Biology
1 answer:
JulsSmile [24]3 years ago
3 0

Answer:

Explanation:

B) The pentose in the hairpin adopts only the C-3\' endo pucker conformation.

C) The hairpin adopts a right-handed helix with a diameter of 26 Å .

D) The hairpin contains G:C, A:U, and sometimes G:U base pairs.

DNA and RNA are both nucleic acids. Aside the structural difference of DNA being double stranded and RNA being single stranded, in DNA, the nucleotide bases adenine (A) is paired with thymine (T); while cytosine (C) is paired with guanine (G); howerver in RNA, thymine is replaced with uracil.; thus in RNA, the base pairs are - A:U and G:C

RNA however sometimes take on a dynamic structure, called the wobble case pair where guanine and uracil pair - G:U.

The diameter of RNA is 26 Å, while that of DNA is is 20 Å

The ribose in RNA with a helical structure has a C3’ endo conformation.  

You might be interested in
The number of cells in an average-sized adult human is on the order of 10^14 cells. Use this information, and the estimate that
KengaRu [80]
IF:
Number of cells: C = 10^{14}
DNA lenght: D = 2m = 12.42 * 10^{-4} mi
Distance from Earth to Sun: ES=93000000 mi = 9.3* 10^{7}mi

Then:
a) <span>Over how many miles would the total DNA from the average human stretch?
The answer is product of multiplication of the number of cells (C) and the DNA length (D):
Total DNA: </span>T = C*D
              ⇒ T = 10^{14}*12.42* 10^{-4} mi
              ⇒ T = 12.42* 10^{14-4} mi
              ⇒ T = 12.42* 10^{10} mi
The total DNA from the average human will stretch 12.42* 10^{10} mi

b) How many times would the total DNA from the average human stretch from Earth to the Sun and back?
The answer is concluded from the ratio of the total DNA length (T) and the <em>twice </em>(because of stretch to the Sun and back, thus, <em>two directions</em>) of distance from <span>Earth to the Sun (ES) and :
Ratio: </span>R= \frac{T}{2*ES}
      ⇒ R = \frac{12.42* 10^{10}mi }{2*(9.3* 10^{7}mi)}
      ⇒ R = \frac{12.42* 10^{10}}{18.6*10^{7}}
      ⇒ R = 0.6677* 10^{10-7}
<span>      ⇒ R = 0.6677* 10^{3}
</span><span>      ⇒ [tex]R = 667.7
</span>Thus, 667,7 times will the <span>total DNA from the average human stretch from Earth to the Sun and back.</span>
6 0
3 years ago
Im being ignored help Which of the following is NOT related to a cell's surface area to volume ratio?
mina [271]

Answer:

rate of growth

Explanation:

6 0
2 years ago
Read 2 more answers
Ype the correct answer in the box. Spell all words correctly. What is the process of using natural resources efficiently to ensu
Marat540 [252]

Answer:

The correct answer is - Sustainable development.

Explanation:

Sustainable development is the process of using or utilizing the natural resources in the present in such an efficient way that there will be resources for future generations without compromising their needs.

It is essential in the current situation as people overexploiting the natural resources that it is quite possible there will very few resources will be left for future generations.

5 0
2 years ago
When traits are inherited separately it is called?​
harkovskaia [24]
Cross over? i have no idea lol
6 0
2 years ago
The preferential use of phosphatidylinositol and phosphatidylethanolamine in the cytoplasmic leaflet of membranes leads to incre
spayn [35]

Answer:

The best answer to the question: The preferential use of phosphatidylinositol and phosphatidylethanolamine in the cytoplasmic leaflet of membranes leads to increased:___ would be, D: All of the answers are correct.

Explanation:

There is still a lot of debate among scientists as to the exact way in which phospholipids are distributed between the two leaflets of a cell´s plasma membrane, but what they do know is that there are four kinds, and that phosphatidylinositol (a sterol) and phosphatidylethanolamine appear most commonly on the cytosolic, or cytoplasmic side of the membrane. They also believe that it is this particular arrangement which allows the cytoplasmic side of the membrane to be slightly negatively charged and this role will play a major part in a membrane´s ability to generate an action potential. Also, it is known that these negatively charged ends of the bilayer will allow certain proteins, positively charged ones, to be inserted, and connected to it, to become transporters, or mediators in action potentials and normal activities of cells. Finally, since fatty acids and cholesterol are associated with phospholipids, but have a tendency to be attracted to these particular two types, they tend to give the overall structure fluidity, but also permit  the inner leaflet to assume its particular circular shape around the cytoplasm. This is why the answer is D.    

4 0
3 years ago
Other questions:
  • On which axis will u place the names of the planets?
    10·1 answer
  • A person working in your lab creates a synthetic semi-fluid like substance embedded with proteins that transport nutrients and i
    5·1 answer
  • Two genes for flower color in snapdragons are red and white. When a red flower is mated with a white flower, all of the offsprin
    8·1 answer
  • Explain the importance of open-mindedness and skepticism in scientific thinking
    10·1 answer
  • (WILL MARK BRAINLIEST AND 50pts) As the earth travels around the sun, the sun is always at one focus of an ellipse. What's at th
    8·1 answer
  • Which of the following is a common characteristic of a carbohydrate? *
    5·1 answer
  • The specific structures or behavioral patterns that allow an organism to be successful in their environment are called
    6·1 answer
  • What's the differences between species richness management approach and indicator species management way?
    6·1 answer
  • A green plant is exposed to bright light for 72 hours. What do you predict will occur if the light intensity around the plant is
    15·1 answer
  • What are the characteristics of water due to its polarity
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!