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Vladimir [108]
3 years ago
11

Pls help, it’s 9th grade.

Biology
2 answers:
lara [203]3 years ago
8 0

Answer:

its either C or D, im not sure bc im in 6th

Explanation:

Inga [223]3 years ago
5 0
C I believe because it is a glucose polymer.
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The first person that answered is correct just to let you know!
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The genome size of E.coli is approximately 5X106 bp and can be replicated in 30 minutes. The human genome size is 3X109 bp, abou
Oksana_A [137]

Answer:

Human genome has various replicons.

Explanation:

A replicon which is a unit of DNA, has potential to get replicated independently. So, the DNA replication occurs simultaneously at various replicons as a result of which human genome takes much less time than estimated to get replicated .

In contrast to this, prokaryotes like E.coli have only one origin of replication and thus one replicon due to which replication is restricted to once per cell cycle.

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3 years ago
Boris Magasanik collected data on the proportion of each base in RNA from different species. To compare the relative amount of e
just olya [345]

Answer:

The nucleic acid is a macromolecule present in living systems in the form of either DNA or RNA, whose molecule consists of many nucleotides which are linked with each other to form long chains. The presence of DNA or RNA in an individual promotes continuity of life. The variability and complexity of nucleic acid are dependent on its constituent molecules as, sugar, a phosphate group, and a nitrogenous base. However, two monocyclic nitrogenous bases were classified purines (adenine:A, guanine:G) and pyrimidines (thymine:T, cytosine:C, and uracil:U).

In addition, RNA is a single-stranded structure which differs from DNA in two aspects, the sugar content of RNA is ribose, and pyrimidine base uracil replaces the thymine base of DNA. A ratio between two strands of DNA can be calculated by using Chargrff's rule which states that "DNA from any cell of all organisms possess a 1:1 ratio (base Pair Rule) of pyrimidine and purine bases'.

The purine to pyrimidine ratio in RNA with different bases is given below in the following table:

Presence of single strand in RNA does not follow chargaff's rule and alters the purine: pyrimidine ratio. The above ratio of each base in the given information is not equal, due to which the ratio of purines to pyrimidines is different. The ratio of DNA and RNA is not equal because DNA has its complementary DNA strand. However, bases in RNA might vary due to its single-strandedness property, but its ratio is dependent on the species.

Therefore, it can be concluded that the ratio of purines to pyrimidines is dependent on the species due to its genetic makeup. Hence, option (c) is correct.

7 0
3 years ago
Any change in the nucleotide sequence of DNA is called a?
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Answer:

mutation

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As such, the nucleotide sequences found within it are subject to change as the result of a phenomenon called mutation.

8 0
2 years ago
The diagram is a model of one way that materials move
hram777 [196]

Answer:

they move to an area with lower concentration.

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