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lord [1]
3 years ago
15

Which is correct about dna replication? dna polymerase can build dna from scratch. dna polymerase adds nucleotides in the 3' to

5' direction. the place where the parent dna becomes unzipped during dna replication is called the replication fork. dna is made conservatively. the strand made continuously is the lagging strand?
Biology
1 answer:
Ivahew [28]3 years ago
6 0

The correct answer is: C) the place where the parent DNA becomes unzipped during DNA replication is called the replication fork.


DNA Polymerase doesn't build DNA from scratch, rather it adds the correct nucleotides to the complementary parent strand.


DNA Polymerase adds nucleotides in the 5' to 3' direction, not the 3' to 5' direction.


DNA is made semiconservatively, meaning that there is a template strand from the parent DNA with a complementary strand being the new daughter strand.


The strand that is made continuously is the leading strand. The lagging strand is not made continuously, as it requires the use of Okazaki fragments.

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D. heterotrophic by ingestion, pseudopods

Explanation:

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Their mode of nutrition can be photosynthetic or hetrotrophic. Hetrotrophic  protists   can be divided into  phagotrophs and osmotrops/saprotrophs. The phagotrophs  makes use of the cell body to engulf the food materials as  in amoeba ,carry out extracellular digestion before swallowing it.

Osmotrops absorbed dissolved food from surrounding liquid environments directly. (Some photosynthetic protists can also be heterotrophic.

Amoeboid movement is the mode of locomotion of protists and some  other eukaryotes. It involved the protrusion of cytoplasm, which exert pressure on the cell membrane to form pseudopodia and  the posterioly  evolved  <u>Uropods. </u>

<u />

<u>  </u>

<u>Sol-gel theory has been proposed to expalin this movements, The ectopalsm of amoeba is gelly-like , while the endiplams is less viscpus   and said to be sol. The interchange of the cytoplasmic fluis between the endo-and ecto plasm gives the SOL-GEL propulsion of the protopalms for the amoebic moveemnts .</u>

<u />

<u>The false feet(psuedopodium) drags the amoeba  along in the direction of the flow of the cytoplasm.</u>

Therefore option D is  the right option

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