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
zloy xaker [14]
3 years ago
15

A newborn baby dies soon after birth because her diaphragm and rib cage muscles failed to contract and she was unable to breathe

on her own. Examination of the baby’s DNA revealed that she had a genetic mutation in a gene that encoded a calcium-binding protein. Which protein was most likely defective in the baby?
Biology
2 answers:
kozerog [31]3 years ago
8 0

Answer:

Troponin

Explanation:

This is a complex of three proteins  (Trop C, I, T) that are responsible for muscle contraction of  the skeletal and cardiac  muscles . its binds with protein tropomysin  to lie in the grove between the actin filaments.  its prevents contraction by blocking  myosin crossbridge  in a relax muscles.Inorder to aid contractions  calcium ions binds with troponin, which leads to confrontational change.This exposes myosin on actin filaments,  leading to formation of crossbridge and therefore contraction of muscles.

Therefore if there is  a mutation in the gene that encoded Troponin, as explained above, calcium ion  will not be able to bind with tropinin, and there will be no exposure of myosin on actin filaments, no binding of  myosin on actin to cause crossbridge, and consequently no  muscle contraction,

Thus the intercoastal  muscle and diaphragm will not contract leading to death of the baby.

svp [43]3 years ago
8 0

Answer:

The question is incomplete, it lacks options. The options are:

A) Actin

B) Myosin

C) Acetylcholine

D) Tropomyosin

E) Troponin

The correct answer is (E)Troponin

Explanation:

Actin and myosin are proteinous filaments responsible for the force that drives the muscular system. These two proteins need to interact in order to generate this force. Here comes the role of a third protein called TROPONIN.

Troponin is a protein that plays a vital role in muscular contraction. It is a complex made up of Troponin I, C and T which binds to calcium ions that triggers a change, bringing about contraction in muscles.

What really occurs when calcium ions from the sarcoplasmic reticulum bind to the troponin complex is that the complex of troponin changes its conformation, causing tropomysin (a protein that regulates the binding of myosin to actin by covering the binding site in a relaxed muscle state) to shift from the binding sites of myosin located on ACTIN. This allows myosin to bind to actin forming a cross-bridge. This triggers muscle contraction necessary for breathing.

However, if troponin is defective due to a change (mutation) that has occurred in the gene that encodes it, the process of bringing about contraction will not be possible, which will lead to inability to breathe and subsequently death. This is the case of the new born baby.

You might be interested in
What will happen to the amount of prairie ecosystem if ice age?
kherson [118]
<span>An ice age is the amount of the Earth's water that is locked up on land in the form of glaciers.
</span>According to the scientists, an ice age occurs every 100,000 years. There are five major ice ages in the Earth's history. That are the Andean-Saharan, Huronian, Karoo Ice Age, Cryogenian, and the current Quaternary glaciation.
But, If we entered another ice age currently, it would increase the amount of locked water in the form of glaciers and hence it would have huge consequences for human civilization and the ecosystem. 
8 0
3 years ago
Help (Brainliest!) (19 POINTS!!!)
pochemuha

Answer:

The fourth one

Explanation:

6 0
3 years ago
How much of the marine environment's biodiversity is contained in earth's coral reefs
IrinaVladis [17]
60 percent of the biodiversity is in coral reefs
5 0
3 years ago
Name two basic mold types that distinguish casting processes.
xeze [42]

<span>The two basic molds are: Expendable mold and permanent mold. </span>

Molding is a process where a rigid frame (mold) is being used to manufacture by shaping liquid or pliable raw materials. However, molding is synonymous to casting; casting is a process where a liquid metal is delivered into a mold which contains a hollow cavity of the intended shape. 

Expendable mold casting can be classify as sand, plastics, plaster which make use of non-reusable or temporary molds  while Permanent mold casting is a metal casting process that use reusable molds.

7 0
3 years ago
Why do we need to fish on the reef?
Allushta [10]

Answer:

we dont but when we fish in the reef it gives us more fish faster but people to lazy to take n' hour longer and not destroy the reef

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • Cobalt 60 used to infertile <br>flies in farm. Is it a<br>right choice?​
    7·1 answer
  • The enzyme dna _______ chemically bonds together two dna strands and removes nicks in a dna duplex.
    9·1 answer
  • BRAINLIESTTTT ASAP!!<br><br> What are the starting compounds in the process of cellular respiration?
    10·1 answer
  • 1. Tom was seriously injured in a car crash. As a result, he had to have one of his kidneys removed. Does Tom need dialysis? Why
    9·1 answer
  • During proofreading, which of the following enzymes reads the DNA?
    9·1 answer
  • What are three sources of signals related to the regulation of cell growth and division?
    5·1 answer
  • The diversity within the wild bird species in the
    5·1 answer
  • Select the correct location on the image.
    6·2 answers
  • Natural selection favors individulas with ______ extremes of one or more traits.
    12·1 answer
  • La cantidad de energía que llegaría al cuarto nivel trófico en un ecosistema
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!