Membrane fluidity can be buffered by cholesterol in both warm and cold environments. At high temperatures cholesterol raises the melting point, while at lower temperatures cholesterol prevents the formation of crystalline structures between phospholipids.

Membrane fluidity can be buffered by cholesterol in both warm and cold environments. At high temperatures cholesterol raises the melting point, while at lower temperatures cholesterol prevents the formation of crystalline structures between phospholipids.

Template strand cytosine and adenine are methylated in DNA replication, which allows DNA mismatch repair enzymes to distinguish between old and new DNA strands.

In contrast, histone acetylation relaxes DNA coiling and allows for the DNA to be transcribed.

You can remember that methylation makes DNA mute, and acetylation makes DNA active.

Template strand cytosine and adenine are methylated in DNA replication, which allows DNA mismatch repair enzymes to distinguish between old and new DNA strands.

In contrast, histone acetylation relaxes DNA coiling and allows for the DNA to be transcribed.

You can remember that methylation makes DNA mute, and acetylation makes DNA active.

Tertiary structure of a protein is determined by interactions between the R-groups of the amino acids that make up that protein. The secondary structure of a protein is mediated by the backbone atoms of the polypeptide chain which includes the carboxyl and amine groups. The alpha carbon are what the R-groups are attached to an do not directly contribute to any level of protein structure.

Tertiary structure of a protein is determined by interactions between the R-groups of the amino acids that make up that protein. The secondary structure of a protein is mediated by the backbone atoms of the polypeptide chain which includes the carboxyl and amine groups. The alpha carbon are what the R-groups are attached to an do not directly contribute to any level of protein structure.

Uracil is one of the nucleotide bases that composes RNA. It is replaced by thymine in DNA.

Uracil, thymine, and cytosine are pyrimidine residues, capable of bonding and pairing with the purines adenine and guanine via hydrogen bonding. During DNA replication, thymine matches with adenine. During transcription, uracil matches with adenine.

Uracil is one of the nucleotide bases that composes RNA. It is replaced by thymine in DNA.

Uracil, thymine, and cytosine are pyrimidine residues, capable of bonding and pairing with the purines adenine and guanine via hydrogen bonding. During DNA replication, thymine matches with adenine. During transcription, uracil matches with adenine.

Nucleotides (DNA monomers) and ribonucleotides (RNA monomers) are formed from a pentose sugar, phosphate group, and nitrogenous base. Each nitrogenous base has a complement that allows it to form hydrogen bonds to the template strand. This allows for the proper sequence of genetic code in DNA replication and RNA transcription.

Purine residues will always pair with pyrimidine residues. The purines are adenine and guanine. The pyrimidines are cytosine and thymine in DNA, and cytosine and uracil in RNA. Adenine will match with thymine or uracil, forming two hydrogen bonds, while cytosine will match with guanine to form three hydrogen bonds.

Nucleotides (DNA monomers) and ribonucleotides (RNA monomers) are formed from a pentose sugar, phosphate group, and nitrogenous base. Each nitrogenous base has a complement that allows it to form hydrogen bonds to the template strand. This allows for the proper sequence of genetic code in DNA replication and RNA transcription.

Purine residues will always pair with pyrimidine residues. The purines are adenine and guanine. The pyrimidines are cytosine and thymine in DNA, and cytosine and uracil in RNA. Adenine will match with thymine or uracil, forming two hydrogen bonds, while cytosine will match with guanine to form three hydrogen bonds.