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
avanturin [10]
3 years ago
12

An individual with the disorder Xeroderma pigmentosum is hypersensitive to sunlight succumbs to DNA damage caused by light expos

ure. What is the probable cause for this disorder?
Biology
1 answer:
Svetlanka [38]3 years ago
8 0

Answer:

Mutations of enzymes involved in nucleotide excision repair.

Explanation:

  • Xeroderma pigmentosum is a genetic disorder and the person suffering from this disorder is sensitive to ultraviolet light due to the disability of the enzymes involved in nucleotide excision repair which prevents DNA damage caused by ultraviolet light.
  • Thus, the individuals are sensitive to the exposure of UV and suffer severe problems when exposed to sunlight.
  • The major cause of the disorder is the inability to repair DNA damage caused by exposure to sunlight due to the mutation in an enzyme involved in nucleotide excision repair.
  • Nucleotide excision repair is a DNA repair process that can excise out single-stranded DNA that is damaged by UV.
  • UV exposure leads to the addition of bulky adducts in the DNA known as thymine dimers. The enzymes of NER are involved in the removal of these adducts by excising out a segment of DNA that contains such lesions.
  • However, in the case of XP, the mutations make this repair system non-functional or partially functional and thus, the individual becomes highly sensitive to UV exposure.
You might be interested in
What type of organism would most likely be found in place of the question marks?​
ruslelena [56]

Answer:

Decomposers

Explanation:

The diagram in this question illustrates a food web, which is a series of interlinked food chains in an ecosystem. In a food chain as depicted in the image, the arrows point to the organism that feeds on another organism. For example, an arrow is pointing from Idaho fescue to an Elk meaning that the elk will feed on that plant.

Different trophic levels constituting organisms exists in the food web including; producers (plants), primary consumers, secondary consumers, tertiary consumers etc. However, as observed in the image, a general arrow carrying along all the organism is pointing towards the organism in the question mark. This organism is called DECOMPOSER.

A decomposer, usually a microorganism, is an organism that breaks down dead organisms and returns the nutrient to the soil for recycling. All organisms in the food web will eventually die and when they do, they'll be decomposed by a decomposer. This is why the arrow pointing towards the decomposers include all organisms.

8 0
3 years ago
_____ acts as a messenger between DNA and the ribosomes.
motikmotik
The answer is C. RNA, but it should really by called mRNA for Messenger RNA 
4 0
3 years ago
Read 2 more answers
A hypothetical phylogeny for marsupial relatedness is shown here. Macropodidae is the marsupial family. Which of these statement
Darina [25.2K]

Answer: B and E

Explanation: USATESTPREP

3 0
3 years ago
A.There were more sunspots in 1965 than in 1701
Anna007 [38]
The answer to your question is B<span />
3 0
3 years ago
How will a microscopic model of an ecosystem differ from a large-scale system? (1 point)
Nadusha1986 [10]

Answer:

O Microscopic models move at a much faster rate than large-scale systems

Explanation:

In the passage it reads, " This small sample of the biosphere changes just like a large-scale ecosystem, except this microscopic model moves at a much faster pace"

Hope this helps :3

6 0
3 years ago
Other questions:
  • What is a open system??
    13·2 answers
  • Biodiversity is the number of species...
    8·1 answer
  • What falls in the gray area between living and nonliving things?
    13·1 answer
  • Why do cells have to produce rna from dna?
    10·1 answer
  • A new highly nutritious crop is going to be planted in an area where it has never been planted before. Which is the most likely
    13·2 answers
  • Put the vocabulary words in order from largest level of organization to smallest. Reorder answers 1. Population Reorder answers
    6·1 answer
  • Leslie argues that an organism called a Euglena is a plant because it is eukaryotic, has a nucleus, makes its own food, and is u
    13·1 answer
  • Examine the amino acid sequences from three organisms (A, B, and C). Which two organisms are the most closely related?
    9·2 answers
  • Fossils and living organisms showing evidence of an intermediate state between one set of characteristics and another is called_
    9·1 answer
  • Describe the purpose of DNA simple words
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!