Exam 1: The Molecular Basis of Heredity, Variation, and Evolution

Organisms are constantly evolving and phylogenetic relationships can be reevaluated.Refer to the phylogenetic tree to answer the following questions. -Which groups are more closely related: lancelets and tunicates,or lancelets and hagfishes?

During DNA replication,nascent DNA strands are synthesized in only one direction.Nucleotides are added only to which end of the nascent strand?

What is the process of synthesizing proteins from mRNA sequences?

Peptidyl transferase and other proteins power the continuous progression of the ribosome along mRNA and catalyze what type of bond formation in the growing chain?

DNA replication is called ________ because the newly replicated DNA consist of a parental strand (from the original DNA)and a newly synthesized daughter strand.

Which enzyme is active in DNA replication?

What process proposed by Wallace and Darwin describes the higher rates of survival and reproduction of certain forms of a species over alternative forms?

What are the three domains of life?

What type of diagram would you use to depict morphological or molecular similarities and differences that identify evolutionary relationships?

As natural selection increases the frequency of one morphological form over another in the population,what changes at the genotypic level?

What are the five essential characteristics of hereditary material,and why was protein originally believed to be a better candidate for the hereditary material than DNA?

Sexual reproduction uses meiosis to generate