Nucleic acids

The main function of nucleic acids is to store genetic information, however they are also essential for:

• Cellular metabolism processes

• Nucleotide synthesis

• Messenger RNA synthesis

• Synthesis of carbohydrates, phosphate groups and nitrogenous bases

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NGSS.HS-LS1-1

NGSS.HS-LS3-1

One of the big differences between DNA and RNA is the number of chains that constitute it, however another difference is:

• The number of phosphate groups, RNA has one and DNA has three (ATP)

• The number of nitrogenous bases and their complementarity

• DNA cannot synthesize proteins while RNA can.

• The sugar present in them, in DNA deoxyribose and in RNA ribose.

In eukaryotic animal cells, DNA can be found within the nucleus and within:

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• Nuclear membrane

• Chloroplasts

• Mitochondria

• Ribosomes

When analyzing the proportions of nitrogenous bases of a single-stranded fragment of human DNA, the results were as follows: 35% of A, 27% of G, 13% of C, and 25% of T. The proportions of bases of the complementary chain will be.

• T=35%, C=27%, G=13%, A=25%

• T=25%, C=13%, G=27%, A=35%

• U=25%, C=13%, G=27%, A=35%

• T=25%, C=25%, G=25%, A=25%

Tags

NGSS.HS-LS3-1

When analyzing the proportions of nitrogenous bases of a single-stranded fragment of human RNA, the results were as follows: 25% of A, 35% of G, 20% of C, and 20% of U. The proportions of bases of the complementary chain will be.

• 25% of A, 35% of G, 20% of C, and 20% of U

• 25% of U, 35% of C, 20% of G, and 20% of A

• RNA has no complementary strand, it is single-stranded.

• None of the above

What would happen if the s phase of the cell cycle did not take place?

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NGSS.HS-LS1-4

What would happen if the DNA replication process did not take place?

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NGSS.HS-LS3-2

In the following image of the replication process, the enzyme is acting in the indicated place:

• Polymerase

• Topoisomerase

• Helicase

• Ligase

The following image refers to a conservative replication process? Why?

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What is the main function of exonuclease enzymes?

• Stabilize the strand

• Add complementary nucleotides

• Correct any errors to ensure the integrity of the genome

• Unwind the DNA strand