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
Andreas93 [3]
3 years ago
9

The two strands of a DNA double helix

Biology
1 answer:
trapecia [35]3 years ago
4 0
Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain. The chemical backbones of the double helix are made up of sugar and phosphate molecules that are connected by chemicals bonds, known as sugar phosphate backbones.
Hope this helps
You might be interested in
The __________carries oxygen-poor venous blood from above the diaphragm from areas of the upper body and extremities into the ri
saveliy_v [14]

Answer:

Superior vena cava

Explanation:

Of the two vena cava, the superior vena cava is the large vein without valves that is responsible for conveying de-oxygenated blood from the upper extremities and body (neck, chest, arm and head) above the diaphragm to the right artrium.

Although the superior vena cava is a large vein, it also short; it is about 2 cm wide and 7 cm long.

When there is an obstruction of the superior vena cava, it can result to the enlargement of the veins and could lead to chest pain and breathlessness.

6 0
3 years ago
Which of the following are true in prokaryotic cells?
allsm [11]

Answer:

just 3 and 4 are false I think.

4 0
3 years ago
A eukaryotic gene contains 14 exons. Most of the transcripts from this gene contain all 14 exons, but some contain only 11 exons
WARRIOR [948]

Answer:

D. Alternative splicing is the mechanism that produce complexity in the genes by splicing some of the protein coding part (exons) of a genes

Explanation:

There are certain splicing enhancers sites present in Exons which facilitiates the binding of RNA binding protein specifically SR protein family rich in Serine and Arginine residues. This SR protein will help in splicing of exons.

The significance of this type of mechanism is the ability of a cell to produce an isoform of protein which have retain their function.

This mechanism also help is diversity or in short in evolution.

8 0
3 years ago
The scuba diver is a living system. The scuba gear or self- contained underwater breathing apparatus, is a system of air exchang
Verdich [7]

Answer: The carbon dioxide is the output and oxygen is the input of the Scuba apparatus.

Explanation:

The scuba apparatus is a life saving apparatus used by the sea divers. It recycles the exhaled gas and removes the carbon dioxide and compensates for the utilized oxygen gas before the diver is actually supplied with the gas for the purpose of breathing in a circuit. Hence, the carbon dioxide gas is the output and the oxygen is the input.

5 0
3 years ago
Why is the circulatory system is considered a system
vitfil [10]

Answer:

hope it helps

Explanation:

The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.

7 0
3 years ago
Other questions:
  • What is the correct arrangement of the bones of a vertebral column starting from the brain to the legs?
    5·1 answer
  • What type of earthquake wave can travel through both liquids and solids? a. P waves b. S waves c. focus waves d. surface waves
    11·2 answers
  • What are the waste products of respiration
    14·2 answers
  • It's important to __________ throughout your personal training plan and reset goals if necessary. A. stop training for five-day
    11·2 answers
  • Which of the following statements about classification of organisms is true?
    6·1 answer
  • An earthworm lives and reproduce is in the soil it aerates the soil and adds organic material to it the earthworm is a source of
    10·2 answers
  • Indicate whether each of the following descriptions is true of microtubules (MT), microfilaments (MF), intermediate filaments (I
    12·1 answer
  • Energy is released during chemical reactions that occur in
    11·1 answer
  • Which two elements are<br><br>mainly found in the inner<br><br>and outer core?
    11·1 answer
  • 4. Two experiments were mentioned in the talk: one that tested food preference in caterpillars, and another that tested for egg-
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!