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
Anvisha [2.4K]
3 years ago
9

Ricin is one of the most powerful toxins known. The protein consists of two subunits: the A chain is an enzyme that inhibits tra

nslation and the B chain is a lectin that binds to carbohydrates on the cell surface. What is the most likely mechanism by which ricin enters the cell
Biology
1 answer:
Ksivusya [100]3 years ago
5 0

Answer:

a. The protein is internalized by endocytosis.

b. The A chain binds to clathrin. The B chain interacts with SNARES

c. The A chain stimulates autophagy

d. The protein enters through pore complexes in the plasma membrane.

The correct option is a

The protein is internalized by endocytosis.

Explanation:

The protein is internalized by endocytosis because Ricin is a potent toxin gotten from lecithin. It internalised in the intracellular cell by endocytosis or substances are brought inside the cell and translocated into the cystosol which hereby inhibit protein synthesis and kill the internal cells. These internal toxins are transported to lysosomes for degradation

You might be interested in
Soo-Jung used the subtraction property of equality to solve an equation for y. Which equation could be the one that Soo-Jung sol
antiseptic1488 [7]

Explanation:

Option 1.

4y=12

Dividing 4 both sides

y=3

Division property should be used.

Option 2.

\dfrac{y}{4}=12

Cross multiplying each other,

y=12(4)

y=48

Option 3.

2(4y)=12

Opening bracktet in LHS

8y=12

Dividing both sides by 8 i.e.

y=\dfrac{12}{8}\\\\y=\dfrac{3}{2}

Division property is used.

Option 4.

y+4=12

Subtracting both sides by 4 i.e.

Y+4-4=12-4

y=8

Subtraction property is used.

<em><u>It means that in option (4) Soo-Jung used the subtraction property of equality to solve an equation for y.</u></em>

3 0
3 years ago
Read 2 more answers
Can someone please denfine metals and non nonmetels to me.?
TiliK225 [7]

Metal -a solid material that is  hard, shiny, malleable, fusible, and ductile, with  electrical and thermal conductivity.\

nonmetal an element or substance that is not a metal.

3 0
3 years ago
If thymidine dimers created by UV irradiation persist until DNA replication, DNA polymerase is likely to make a mistake reading
marishachu [46]

Answer:

Thymidine dimers is likely to be repair as soon as it is originated but if left unrepaired then it causes  frame shift mutations.

Explanation:

In case of Bacterium if UV irradiation induces covalent linkage of two thymidine present adjacently to each other or on a single strand to make thymidine dimers.

These either excised via DNA repair enzyme like Endonuclease V and the proof reading activity of DNA polymerase I enzyme help in incorporation of nucleotide by taking the unmutated original strand as a template.

These dimers if not excised before second round of replication than the sequence of newly synthesized strand will be altered. As DNA polymerase III enzyme read thymidine dimers as single thymidine nucleotide and incorporate only 1 adenine in the newly synthesizing complementary strand which results in frame shift mutations

It is the mutation in which reading frame of codons is shifted or altered due to deletion or addition of a single nucleotide.

7 0
3 years ago
A qualified genetics counselor is working with a child who has been diagnosed with fragile x syndrome. after extensive research
Alenkinab [10]

Answer:

CPT® Index - 96040

icd-10-cm code - Q99.2

Explanation:

Here in this case the diagnosis came out with fragility in X chromosome. This is some thing related with medical genetics. Hence, the CPT® Index for this scenario would be 96040. As per the American Medical Association, CPT® Index 96040 cover cases that fall into the category of “Medical Genetics and Genetic Counseling Services” which also involves counseling either with the patient or family for 30 minutes. The icd-10-cm code – Q99.2 deals with the problems associated with genetic abnormality

Hence, the answer is

CPT® Index - 96040

icd-10-cm code - Q99.2

8 0
3 years ago
What kind of mutation is demonstrated below:<br> ATGCCATGGCATTGA --&gt; ATGCCATGCATTGA
BigorU [14]

Answer:

Deletion

Explanation:

ATGCCATG<u>G</u>CATTGA

-->

ATGCCATGCATTGA

Comparing the two sequences, you can see that one G nucleotide is missing in the new sequence compared to the original.

This is a single nucleotide deletion, where one nucleotide is lost from the sequence. Otherwise, the sequence is entirely unchanged.

4 0
3 years ago
Other questions:
  • Which of the following is not a product of cellular respiration?
    9·2 answers
  • What is the study of fossils and past life called.
    5·2 answers
  • What two or three organisms are most important in the mono lake ecosystem?
    14·1 answer
  • What can he assume about the number of adenine?
    10·2 answers
  • How would you best describe the role of gene expression in cells brainly
    9·2 answers
  • The chemical that promotes phototropism is _____.
    7·1 answer
  • Explain how scientist might use a Dichotomas key/chart
    9·2 answers
  • Examples of semi permeable membrance​
    11·1 answer
  • An example of mitosis at work is a plant root
    13·1 answer
  • How do producers contribute to the food chain?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!