Biochemistry 2280A Lecture 1: Chemical Basis of Life
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13 Sep 2016
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Biochemistry: study of living systems and how molecules interact. Dogma represents the flow of information whereby genetic information that is stored in our. Dna as a sequence of nucleotides gets transformed into phenotypic information in the form of proteins. How genetic information can be passed on as cells divide and how dna can be replicated as cells divide. Protein encoding information is stored in the genes in the dna and it is a function of the nucleotide sequence. Transcription: copy of one strand is made into rna then nucleotides in rna specifies the synthesis of a protein (sequence of amino acids translation) Enzymes, structural proteins, transport, motor, storage, gene regulatory, receptor, signal. Dna can encode 20 different amino acids to make up proteins. Triplets of nucleotides: codons each specifies an addition of an amino acid into the peptide chain during translation. Orchestrated by ribosome trna have anticodon that recognizes a particular codon on mrna.
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Related Questions
Which statement is not correct?
Mutations change the sequence of nucleotides in DNA. |
Mutations can be caused by mistakes made during the copying ofDNA. |
Mutations can be caused by toxic chemicals in theenvironment. |
Mutations are not random. |
Mutations can change the function of proteins. |
Mutations are the basis for all of the genetic diversity thatexists. |
Which statement is not correct?
Chromosomes contain genes. |
Chromosomes are made of DNA wrapped around protein. |
Eukaryotes have many, linear chromosomes in their cells. |
Different species can have a different number ofchromosomes. |
DNA is made by putting a string of amino acids together. |
Which statement is not correct?
Cells with homologous chromosomes are diploid |
Cells with homologous chromosomes are haploid |
Gametes are haploid |
Diploid cells have two sets of chromosomes in theirnucleus. |
Which is not a good example of alleles?
Brown hair and red hair, for the hair gene. |
Stripes and no stripes, for a striped gene. |
Ear lobe gene and freckles gene. |
Straight nose and pug nose, for a nose gene. |