what is the type of change in DNA's base sequence where only one base is affected? it is not mutation.

Question

anonymous · Answer

You sure it's not mutation? When I looked at this question, right away I thought "point mutation." 

Are there any other options that you're thinking of?

anonymous · Answer

Not really. This paper is a crossword and the word is like p_i__
That's the only clue I know.

anonymous · Answer

Point mutation. "Point"? Make sense?

anonymous · Answer

oh! haha thank you. Can you also help me with RNA is a polymer of ____e_t_r_s?

anonymous · Answer

its something molecule.

anonymous · Answer

Are you sure there's a letter R in the answer?

anonymous · Answer

Because DNA and RNA are both polymers of "nucleotides." 

It would fit, all except for the fact that there's an R in there.

anonymous · Answer

one of the questions says: the larger of Dna and rna and isn't it rna?

anonymous · Answer

DNA is larger. Here's DNA: http://blogs-images.forbes.com/daviddisalvo/files/2011/11/DNA.jpg You see how it's a double helix? And then here's RNA: http://www.biologycorner.com/resources/mRNA-colored.gif It's about half the size of DNA. It's not a double helix.

anonymous · Answer

Here's a better comparison picture for you: http://www.accessexcellence.org/RC/VL/GG/images/rna.gif

anonymous · Answer

Oh. i see... there's something i am confused with. name given a substance which can cause changes in DNA's base sequence. Isn't it mutation? but the word doesn't fit.

anonymous · Answer

Mutations are more like...events. 
They're not substances.

anonymous · Answer

But the answer DOES have to do with mutations.

anonymous · Answer

hm...it's hard(x

anonymous · Answer

What you're talking about is a substance that can CAUSE a mutation. 

Any idea? 

Is there a powerpoint that goes with the chapter of your crossword puzzle? 
It'd probably be in there. You could look it over.

anonymous · Answer

Mutagen.

Does it fit?

anonymous · Answer

i got it!

anonymous · Answer

mutagens?

anonymous · Answer

oh. haha yeah(x
i need help with onee last one. 
along with RNA, this makes up a whole ribosome.

anonymous · Answer

lol good job.

Mutagen, mutagens, 
it depends on whether the crossword is looking for singular or plural.

anonymous · Answer

Do you know what ribosomes do?

anonymous · Answer

they help build protein.

anonymous · Answer

Yep, exactly. 

They're made of RNA and proteins. 

Does "protein" or "proteins" fit?

anonymous · Answer

oh! yeah. thank you!

anonymous · Answer

Sure, no problem.