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
Nitella [24]
2 years ago
14

Comparing amino acid sequences in proteins has been used to determine the relatedness of organisms. Below is a graphic that show

s the amino acid sequence differences between different organisms for a protein keratin. Changes in amino acid sequences are known to cause changes in structure of proteins. Species A Species B Species C Species D Species E Species A 4 11 19 1 Species B 12 18 5 Species C 8 10 Species D 20 Species E Part A. Consider species A, D, and E. Using the data provided, describe how the structures of their keratin proteins would compare. Part B. Keratin is made up of about 450 amino acids. Determine the similarity in percentages between species A and B, A and C, and B and C. Explain how amino acid sequences can be used in determining how closely related two species are. Part C. Based on this data, predict which two species would be more closely related to one another. Part D. Justify your predictions to part C.
Biology
1 answer:
Tju [1.3M]2 years ago
7 0

Answer:

A) Species A and E are more closely related than either species are related to species D.

B) Between A and B = 99.1%

Between species A and C =97.5%

Between species B and C = 97.3%

Similarity in amino acids sequence reflects similarity in DNA sequence

C) Species A and E are most closely related

D) Species A and E have the most similarity in amino acid sequence, and hence DNA sequence.

Explanation:

A) The amino acid sequences of the protein, keratin, in species A and D has a difference of about 19 whereas species A and E have a difference of only 1. Therefore, it means that keratin in species A and D will have differences in structure whereas between species A and E, they would have almost the same structure.

Also, species D and E have a difference of 20 in their amino acids sequence, therefore, the structure of keratin in both species will have differences in structure.

B) Similarity between A and B:

450 - 4 = 446

In percentage: 446/450 × 100% = 99.1%

Similarity between A and C:

450 - 11 = 439

In percentage: 439/450 × 100% = 97.5%

Similarity between B and C:

450 -12 = 438

In percentage: 438/450 × 100% = 97.3%

The sequence of DNA of species determines their amino acid sequences because information in DNA is transcribed to RNA which are then used to make proteins. Therefore, if a species are very closely related, they are expected to have very similar genetic sequences and thus proteins too. This is reflected in similarity between amino acid sequences in their proteins.

C). Species A and E are most closely related.

D) Species A and E have only a single difference in their amino acids sequence for Keratin. This translates to about 99.7% similarity which is the highest among all the species compared. Therefore, species A and E are most closely related.

You might be interested in
Glucose, C6H1206, is best described as an)<br> Multiple Choice<br> compound<br> element<br> isotope
kap26 [50]

Answer: B. Element

Explanation

8 0
3 years ago
Read 2 more answers
BIOLOGY DNA SECTION 1
vekshin1

1. to ensure continuity and preservation of genetic material.

2.semi conservative

3.a DNA polymerase : unzip the DNA strand.

b Helicase : unwind dna strand

4.during the s stage of interphase

5. Nucleus

7 0
3 years ago
What force has the most influence on the depth of tides?
Sphinxa [80]
Tides<span> are the rise and fall of sea levels caused by the combined effects of the gravitational </span>force sexerted by the Moon and the Sun and the rotation of the Earth<span>. The times and amplitude </span>of tides<span> at a locale are </span>influenced<span> by the alignment ..... South of Cape Hatteras the </span>tidal forces<span> are </span>more<span>complex, and cannot be predicted ...</span><span />
6 0
3 years ago
Which of these choices is the cytoskeleton's main structure? It provides support, structure, and
Greeley [361]
Answer: The answer is B
3 0
3 years ago
Many coastal communities oppose the proposal to set up tidal plants, even though they recognize that the solution to the current
matrenka [14]
I would say it may generate harmful emissions
8 0
3 years ago
Other questions:
  • Which organisms contain Nucleic Acids? Check all that apply.
    15·2 answers
  • Answerswhat should you do if you suddenly find yourself in cold water?
    11·1 answer
  • What are the skin layers from inside and outside of your body
    11·1 answer
  • what does this mean about the relationship between an allele’s frequency and it’s likelihood of being dominant ?
    8·1 answer
  • Why is a smaller volume of the cell better?
    13·1 answer
  • Which diseases or disorders affect the spinal cord?
    7·1 answer
  • What's the different metaphase 1 of mesious and metaphase of mitosis?
    5·1 answer
  • What is the life span of a monkey?
    15·2 answers
  • PLEASE HELP ME!!!!!!!!!!! I WILL GIVE BRAINLIEST IF CORRECT!!!!!!!!
    12·2 answers
  • Which hormone only has an effect in females?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!