Which of the following is true about DNA?
A.
It is a single-stranded molecule.
B.
Only one of the original DNA strands acts as a template during replication.
C.
Both of the original DNA strands act as templates during replication.
D.
Its replication takes place in the cytosol.
2006-12-22 11:03:27 · 16 answers · asked by David 2 in Science & Mathematics ➔ Biology
C is the only one that is always true. (Look up semi-conservative replication if you want more information, particularly the Meselson-Stahl experiment.)
A is true mostly for viruses, but not other organisms.
B is not true for double-stranded DNA.
D is true in prokaryotes since they have no nucleus, but is not true in eukaryotes.
2006-12-22 11:27:41 · answer #1 · answered by Sephisabin 3 · 1⤊ 0⤋
All of the statements are true - but it depends upon the circumstances.
A. Some viruses do have single -stranded DNA. The best example is "parvovirus" - the type of virus you would be worried about if you had dogs or cats.
B. If single-stranded to begin with (see above), then only one strand can be replicated at a time.
C. If DNA is double-stranded (= "normal" DNA, the type found in our cells), then both strands will be replicated. IF YOUR TEACHER IS INSISTING ON ONE CORRECT ANSWER - this is it !!
D. Since bacteria do not have a nucleus, DNA replication, for them, does take place in the cytosol.
2006-12-22 11:33:51 · answer #2 · answered by Anonymous · 1⤊ 1⤋
C.
Both of the original DNA strands act as templates during replication.
2006-12-22 11:14:45 · answer #3 · answered by fairygothmommy 2 · 1⤊ 1⤋
c. Both of the original DNA strands acts as a template during replication.
2006-12-22 11:06:43 · answer #4 · answered by Veggie 1 · 3⤊ 1⤋
A:False. DNA is a double stranded helix. (Besides, if it were true than statements B and C would be pointless)
B:True Only one of the strands needs to be copied as the other strand is a complement so any of the strands would do.
C:False. See above.
D: I dont know sorry.
2006-12-25 02:47:35 · answer #5 · answered by danielim3000 1 · 0⤊ 1⤋
A. It's a single-stranded molecule.
2006-12-22 11:06:26 · answer #6 · answered by Supa_Sexy1 2 · 1⤊ 2⤋
A.
It is a single-stranded molecule
2006-12-22 11:11:51 · answer #7 · answered by Anonymous · 0⤊ 4⤋
The answer your teacher wants is "C."
D is true for prokaryotes but not for eukaryotes.
2006-12-22 11:13:17 · answer #8 · answered by Anonymous · 1⤊ 0⤋
b- for Eukaryotic DNA
2006-12-22 11:48:04 · answer #9 · answered by semihemi08 4 · 0⤊ 1⤋
C is the Correct Answer!!!
2006-12-22 12:56:56 · answer #10 · answered by J 3 · 1⤊ 1⤋