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
Aliun [14]
3 years ago
15

When sufficient heat is applied, double-stranded DNA denatures into two single-stranded molecules as the heat breaks all of the

hydrogen bonds. In an experiment, molecules of single-stranded DNA from species X are separately hybridized with supoosedly homologous single-stranded DNA molecules from five species (A-E). The hybridized DNAs are then heated, and the temperature at which complete denaturation occurs is recorded. Based on the data, which species is probably most closely related to species X
Biology
1 answer:
dolphi86 [110]3 years ago
4 0

Answer and Explanation:

When sufficient heat is applied, DNA unwinds, and the hydrogen bonds that grip the strands together weaken and break. The process of breakdown of double-stranded DNA into single strands is called DNA denaturing. The temperature at which double-stranded DNA is half denatured is termed as Tm (melting temperature). By the absorbance of the DNA solution, the amount of strand melting is measured at 260nm. At this wavelength, nucleic acids absorb light. When DNA strands come together, the proximity of the bases in the DNA strands reduces some absorbance. When the DNA strands separate, the absorbance rises 30% to 40%, and quenching of the absorbance disappears. This is known as hyperchromicity. By using DNA denaturation, the sequence difference between the two DNA sequences can also be detected. When double-strand DNA is heated, it denatured into a single-stranded state. The mixture is cooled to allow the strands to re-hybridize. Hybrid molecules are formed among related sequences.

You might be interested in
PLEASE HELP ME FOR THE SAKE OF INKWELL ISLES
Veronika [31]

Answer: d

Explanation:

7 0
3 years ago
Read 2 more answers
The study of interrelationships between living things and the environment is
Serggg [28]
Ecology is the study of the relationship between living organisms and their environment. An ecologist is someone who studies those relationships. An ecosystem is a place, such as a rotting log, a forest, or even a schoolyard, where interactions between living and non-living things occur.
7 0
3 years ago
Which process can transport substances against the concentration gradient?
anzhelika [568]

Answer:

The answer to your question is: Active transportation

Explanation:

Cell can move molecules in or out of it by two processes: Active or Passive transport.

Active transport:  is the movement of molecules against a concentration gradient. Use proteins or enzymes to happen.

Passive transport: is the movement of molecules or ions from a higher concentration to a lower concentration.

7 0
3 years ago
Is autism more common in a certain group of people?
Inessa [10]

Answer:

Explanation:

# Boys are four times more likely to be diagnosed with autism than girls.

# Most children were still being diagnosed after age 4, though autism can be reliably diagnosed as early as age 2.

# 31% of children with ASD have an intellectual disability (intelligence quotient [IQ] <70), 25% are in the borderline range (IQ 71–85), and 44% have IQ scores in the average to above average range (i.e., IQ >85).

# Autism affects all ethnic and socioeconomic groups.

# Minority groups tend to be diagnosed later and less often.

# Early intervention affords the best opportunity to support healthy development and deliver benefits across the lifespan.

# There is no medical detection for autism.

7 0
3 years ago
Read 2 more answers
In all unicellular organisms, cell division and reproduction are the?
Anvisha [2.4K]
The same.
If one cell divides into 2, and they are one cell organisms, that it is also reproduction.
3 0
3 years ago
Other questions:
  • The sum of the number of protons and neutrons in the atom is known as the _____
    6·2 answers
  • What is filled with A enzymes that can break down substances in cells to be used later
    5·1 answer
  • In the life cycle of a moss, the sporophyte remains attached to the __________
    10·1 answer
  • Explain how your fluid balance is maintained even when you<br> exerciseand lose fluids by sweating.
    15·1 answer
  • What structure is common in all 6 kingdoms of living organisms?
    7·1 answer
  • what fruit or seed adaptations might plants have for seed dispersal using biotic vectors such as bird or small mammals?
    7·1 answer
  • What creates biomass
    7·1 answer
  • Plant processes of capillary action, transpiration, and root pressure are the result of seasonal changes, unique properties of w
    8·2 answers
  • The nervous system affects target organs through the release of chemicals called:.
    15·2 answers
  • Carbohydrates are a huge source of...
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!