BISC 103 Midterm

Which permits a single gene to code for more than one polypeptide?

Alternative RNA splicing

....would be considered a transgenic organism?

An E.coli that receives the human insulin gene

When one DNA molecule is copied to make two new DNA molecules, the resulting DNA molecules contain

50% of the parent DNA

if one strand of DNA is TCACCG, then the complementary strand would be

AGTGGC

Broccoli, cabbage, an brussel sprouts all descended from the same species of wild musturd and can still interbreed. These varieties were produced by

Artificial Selection

It is impossible to express a jellyfish protein in a mouse because the genetic code is unique to each species and therefore the codons in these organisms are very different

False

The eastern spotted skunk breads in the late winter while the western spotted skunk a breads in the fall. This is an example of ostayogtic barriers

False

The front paw of a cat and the wing of a butterfly are homologous structures

False

...would NOT contribute to allopatric speciation?

Game flow between the populations continue

Natural selection is sometimes referred to as "the survival of the fittest..." which best describes an organisms fitness?

How many fertile offspring it produces

Which is an example of a post-zygotic reproductive barrier?

Hybrid offspring from mating two species of jimsonweed always died before reaching maturity

do proto-oncogenes relate to oncogenes?

Proto-oncogenes are normal genes that, if muted, can become cancer causing oncogenes

Scientists hypothesize that a major factor promoting the adaptive radiation of mammals was probably?

The mass extinction of most dinosaurs

In Eukaryotes...is true about introns and exons

The mature RNA transcript that will code for the peptide contains only exons

In replication of a DNA molecule, the role of the DNA polymerase is to covalently bond the next nucleotide in the replicating DNA molecule

True

Many transgenic plants are created by taking advantage of the Ti plasmid fro Agrobafctirum lumesfaciens

True

A phage is a virus that infects?

bacteria

A layer of organized colonies of bacteria coating a surface is also known as a

biofilm

Three-domain system

divides the prokaryotes into two different domains

The core theme of biology, which explains both the unity and diversity of life, is

evolution

Under the biological species concept, a species is a group of organisms that

have the potential to interbreed in nature and produce fertile offspring

Structures that evolved from the same structure is a common ancestor are

homologous

The ultimate source of all new alleles is

mutation

...correctly ranks the structures in order of size from smallest to largest?

nucleotide-codon-gene-chromosome

Which species concept is most useful to a microbiologist studying bacteria in the deep ocean?

phylogenetic

The bacterium that causes anthrax can only be killed off by prolonged heating to temperatures considerably higher than boiling water. This suggests this bacterium

produce endospores

Ancient photosynthetic prokaryotes were very important in the history of life because they

produced the oxygen in the atmosphere

You set your "way back" machine for 3 billion years ago and hit the button. When you step out, what do you see?

prokaryotic biofilms in the water

When hybrid organisms produced in a hybrid zone some can breed with each other and species, and they survive and reproduce as well as members of the parent species, one would predict that

reproductive barriers would lessen and the parent species would fuse

Gel electrophoresis sorts DNA molecules on the basis of their

size

....types of mutations would be less likely to affect the sequence and production of the peptide encoded by a gene?

substitution of a single nucleotide

Genetic drift resulting from a disaster that drastically reduces population size is called

the bottleneck effect