• Please review the updated member agreement. Included is a new statement supporting the scientific method and evidence-based medicine. Claims or statements about disease processes should reference widely accepted scientific resources. Theoretical medical speculation is encouraged as part of the overall scientific process. However, unscientific statements that promote unfounded ideological positions or agendas may be removed.

sdnstud

1K Member
10+ Year Member
15+ Year Member
Jul 29, 2003
1,017
0
Visit site
Status
can someone help me with these questions?

#175) Would an exogenous gene introduced into somatic cells be passed from parent to offspring?

i put answer C (No, because changes to somatic cells are not passed to offspring). Correct answer is A (Yes, because the DNA will be localized into the cell's nuclei)

I thought only germ cells are passed to offspring. somatic cells don't go through meiosis, right?

#176) Target gene therapy to specific cells important because:

I put A (all cells contain , but do not express, the same genes) the correct answer is C (different cells contain different genes)

don't all cells have same dna thus same genes? it's the way genes are expressed that diff the cells right?
 

UCLAstudent

I'm a luck dragon!
10+ Year Member
15+ Year Member
Sep 6, 2002
5,046
7
37
CA
Visit site
Status
Resident [Any Field]
Actually, I was going through these questions with my friend tonight. My answer sheet says that the correct answers are what YOU put... I think your answer guide is wrong. There is no way that a gene can be passed on to progeny if it doesn't affect the germ line. Every cell has the same DNA, and, therefore, the same genes. Unique cells arise from differential gene expression.

Don't worry, you are right. :)
 

premyo2002

7+ Year Member
15+ Year Member
Feb 17, 2003
679
1
\\
Status
You have the right answers, but the problem # is wrong. The problems are 171 and 172. I just checked my copy, and the solutions manual
 
About the Ads

UCLAstudent

I'm a luck dragon!
10+ Year Member
15+ Year Member
Sep 6, 2002
5,046
7
37
CA
Visit site
Status
Resident [Any Field]
I think the problem is that it is a different version of the test. I was looking through my friend's version tonight, and there were some questions that weren't in my version, and some of my questions weren't in his version.
 

TripleDegree

Joker Doctor
15+ Year Member
Nov 6, 2003
687
0
Visit site
Status
With respect to exogenous gene introduction in a parent cell, once the foreign gene gets incorporated into the parent's genome, then it becomes an integral part of the DNA.

All cells undergo mitosis, except for the gametes that undergo meiosis. Therefore, since DNA replication is a part of mitosis, I would expect the daughter cells to carry the same genome as the parent did.

I think what does NOT get passed from parent to daughter in somatic cells are errors in transcription, translation, post-trans processing etc. But fundamental changes would be. Therefore, I would have guessed A.
 

Nuel

15+ Year Member
Mar 8, 2003
2,991
1
Rap Group Home
Visit site
Status
Originally posted by TripleDegree
With respect to exogenous gene introduction in a parent cell, once the foreign gene gets incorporated into the parent's genome, then it becomes an integral part of the DNA.

All cells undergo mitosis, except for the gametes that undergo meiosis. Therefore, since DNA replication is a part of mitosis, I would expect the daughter cells to carry the same genome as the parent did.

I think what does NOT get passed from parent to daughter in somatic cells are errors in transcription, translation, post-trans processing etc. But fundamental changes would be. Therefore, I would have guessed A.
The questions was addressing offsprings not the parent's own daughter cells. And you are right in that errors in somatic DNA sequence are the only ones passed to daughter cells, not offspring.

I think this correct.
 

jhk43

Senior Member
7+ Year Member
15+ Year Member
Feb 28, 2004
305
0
Visit site
Status
Whats an aromatic amine? Can an aromatic amine be a primary or secondary amine? if so, which takes precedent?

what the hells a coelom and why are we supposed to know this?

if u add heat, i guess the reaction forms the anhydride. does that mean COOHs are more stable, lower energy? why do you need to add acid then heat? why not heat,then acid?

can esters decarboxylate? only COOHs?
btw, why are beta keto acids more prone to decarboxylation?



btw, are diastomers optically active? is this an irrelevant discussion, like, do orgo people measure optical activity on diasteriomers?
 
C

Curious Tom

Where did you get those aamc older versions?
I have the revised 4-6R. I've been trying to get hold of those III-V or VI.
I'd appreciate your info.
 

UCLAstudent

I'm a luck dragon!
10+ Year Member
15+ Year Member
Sep 6, 2002
5,046
7
37
CA
Visit site
Status
Resident [Any Field]
Originally posted by jhk43
Whats an aromatic amine? Can an aromatic amine be a primary or secondary amine? if so, which takes precedent?

what the hells a coelom and why are we supposed to know this?

if u add heat, i guess the reaction forms the anhydride. does that mean COOHs are more stable, lower energy? why do you need to add acid then heat? why not heat,then acid?

can esters decarboxylate? only COOHs?
btw, why are beta keto acids more prone to decarboxylation?



btw, are diastomers optically active? is this an irrelevant discussion, like, do orgo people measure optical activity on diasteriomers?
An aromatic amine is an aromatic ring with a nitrogen group incorporated into the ring structure. It cannot be a primary amine... a primary amine is NH2.

The coelem forms at the boundary between the small and large intestines. The important thing is that it is derived from the endoderm.

Diastereomers can certainly be optically active, as long as there is a chiral carbon and no symmetry.
 
About the Ads