The sugar molecule in RNA has one more hydroxyl group than the sugar molecule in DNA
The only correct statement here is the one regarding the types of sugar in the two molecules. RNA stands for "ribonucleic acid," which is a simple way to remember that it contains the sugar ribose. DNA, on the other hand, stands for "deoxyribonucleic acid." Its sugar is deoxyribose, which is identical to ribose except it is missing a hydroxyl (-OH) group on its second carbon. In total, RNA contains three hydroxyl groups, while DNA contains only two.
In RNA, uracil replaces thymine, not guanine. DNA is generally double-stranded and RNA is generally single-stranded (though both can exist in either form). Prokaryotes contain both DNA and RNA. Finally, DNA is transcribed to RNA in most biological organisms, but RNA can be reverse transcribed to DNA by the protein reverse transcriptase, which is found in some viruses.
Answer:
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
Answer:
Explanation:
DNA is made up of a double helix of two complementary strands. During replication, these strands are separated. ... Most prominently, DNA polymerase synthesizes the new strands by adding nucleotides that complement each (template) strand. DNA replication occurs during the S-stage of interphase.
Answer: When mutation occur in the sex cell/germ cell it is known as Germinal mutation but if mutation occur in cell other than sex cell it will be called as Somatic mutation.
Explanation:
Germlines mutation: As this type of mutation occurs in germ cells (sperm and egg), this mutation can pass on to offspring when either muted sperm or gametes fertilize to form zygote. Example of germline mutation is inherited diseases like Down syndrome.
Somatic mutation: Somatic mutation can occur in any cell like muscle cell, gut, immune system but not in the germ cells and therefore cannot pass to the offspring. Examples of somatic mutation are Cancer and tumor