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
mezya [45]
3 years ago
8

What accounts for the uniform diameter of the DNA molecule? A.The two sides of the DNA molecule are held together by hydrogen bo

nds.
B.A purine always bonds with a pyrimidine.
C. One side of the DNA molecule has an unconnected 5' phosphate group and the opposite end has an unconnected 3' hydroxyl group.
D. The 3' carbon of one deoxyribose and the 5' carbon of another deoxyribose bond together.
E.The alternating sugar and phosphate backbone coils around the outside of the helix.
Biology
1 answer:
stepan [7]3 years ago
8 0

Answer:

B. A purine always bonds with a pyrimidine.

Explanation:

DNA is a polymer of deoxyribonucleotides each of which has a nitrogenous base, a pentose sugar and phosphate group. There are two types of nitrogenous bases present in DNA. Adenine and guanine are the purine bases and have two rings in their structure while the cytosine and thymine are the pyrimidine bases with a single ring structure.

A purine base of one DNA strand always pairs with the pyrimidine base of another DNA strand. Adenine (purine) makes two hydrogen bonds with thymine (pyrimidine) while guanine (purine) makes three hydrogen bonds with cytosine (pyrimidine). The pairing of a purine with a pyrimidine base keeps the diameter of a DNA double helix uniform throughout the length. For instance, the diameter of B-DNA is around 20 angstrom.

You might be interested in
Which structure contains peptidoglycan in bacteria? What is the name of the structure?
Natalija [7]

Peptidoglycan is present in the cell wall of gram-positive bacteria. Bacteria are safeguarded by a robust cell wall comprising peptidoglycan. The layer of peptidoglycan in the cell wall of bacteria refers to a crystal lattice composition produced from linear chains of two alternating amino sugars, that is NAM (N-acetylmuramic acid) and NAG (N-acetylglucosamine). Peptidoglycans is one of the most essential sources of D-amino acids in nature.

5 0
2 years ago
Read 2 more answers
A large amount of extracellular material is a characteristic of which type of tissue? a large amount of extracellular material i
sattari [20]
Lolol i don twhy i need 1- questions

5 0
3 years ago
The flow of energy in an ecosystem is bestdescribed as energy moving in(1) one direction from the Sun to the producersand then t
Fittoniya [83]
The answer is (1) !!
it is one direction, from sun to produces to consumer !!
6 0
3 years ago
Mutations in ubiquitin lead to malfunction of what organelle in ALS that leads to buildup of mis-folded proteins?
sergiy2304 [10]

Answer:

Mitochondria.

Explanation:

Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder in which the neuron died due to mutation in superoxide dismutase 1 gene. This disease is also known as Lou Gehrig's disease.

Mitochondria structure is disorganized in ALS. The ubiquitin protein mutation leads to the malfunctioning of mitochondria and misfolded proteins are made in the mitochondria.

Thus, the correct answer is option (a).

8 0
3 years ago
O
NeX [460]

so what's the question here??

8 0
2 years ago
Other questions:
  • Consider circle O. If AE = 7, EC = 2, and BE = 4, what is ED?
    9·2 answers
  • This type of blood vessel is responsible for maintaining blood pressure during diastole, therefore it has the thickest layer of
    7·1 answer
  • What hydrogen bonds are between adenine and thymine
    8·1 answer
  • What is the list of organelles that take part in protein synthesis
    6·1 answer
  • Question 1
    7·1 answer
  • For practice, type in the name of the set of positions occupied by the three oxygen atoms:
    5·1 answer
  • On average how much energy is passed from one trophic level to the next
    7·1 answer
  • What do scientists theorize about the origins of the Moon? Choose the most recent explanation.
    7·1 answer
  • What are 2 ways carbon can get from the ocean to the lithosphere?
    10·1 answer
  • Who is second most closely related to the dog
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!