BIS 2C Lecture Notes - Lecture 6: Eocyte Hypothesis, Ernst Haeckel, Carl Woese

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29 Aug 2016

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Universal homologies = common characters found in all organisms. B/c all life is related and connected by a pattern of ancestry and descent: molecular and cellular features. Use of dna as a genetic material. Central dogma (dna rna protein) 20 core amino acids in proteins: specific complexes and genes. Central dogma = genetic information is coded in self-replicating dna & undergoes unidirectional transfer to messenger mrna in transcription which act as template for protein synthesis in translation (transcription translation) Central dogma is a conserved feature across life. The genetic code is redundant and conserved across life. The structure and function of the ribosome is conserved across life. Clicker question: the use of water as a solvent is a universal homology. Early attempts of tree of life: aristotle & great chain of being, charles darwin. 1859, ernst haeckel 1866, whittaker 5 kingdom tree 1969: looked at metabolism. Problem with these trees: ignorance of the pattern and process of evolution.

Related Questions

The TATA-binding protein (TBP) binds to the TATA box sequence in eukaryotic promoters. What is its function in transcriptional initiation?

It blocks access of RNA polymerase to the promoter, until removed by general transcription factors.

It is the subunit of prokaryotic RNA polymerase that is required to recognize promoters.

It modifies histones so nucleosomes can be removed from DNA for transcription.

It bends and partly unwinds DNA at a promoter.

The genetic code is said to be âdegenerateâ because

there are more codons than amino acids.

there are more amino acids than codons.

different organisms use different codons to encode the same amino acid.

some codons specify more than one amino acid.

Three general mechanisms appear to be responsible for the conversion of proto-oncogenes to oncogenes

overexpression, point mutations, deletions

inversions, translocations, methylation

familial, sporatic, phosphorylation

None of the above account for the conversion of proto-oncogenes into oncogenes

Transcriptional control of genes that acts by regulating the continuation of transcription is called

induction

attenuation

antitermination

negative inducible control

The genetic code is fairly consistent among all organisms. The term used to describe this consistency is

The F, G, and H loci are linked in the order written. There are 30 cM between F and G and 30 cM between G and H. If a plant Ff Gg Hh is testcrossed, what proportion of the progeny will be ff gg hh, assuming no interference?

DNA synthesis is always from 5â to 3â because

replication must be continuous

the strands are antiparallel

primers lack 3â to 5â exonuclease activity

In the ZZ-ZW sex-determination system, if an AaBb female was crossed to an individual of genotype Aa Bb, what is the probability of a female offspring with the two dominant traits given by alleles A and B? Assume A and B are dominant alleles.

BIS 2C Lecture Notes - Lecture 6: Eocyte Hypothesis, Ernst Haeckel, Carl Woese

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