exam 3

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32 terms · exam three chapters 10-14

RNA contains _______, where as DNA contains _____.

uracil...thyamine

Who discovered the structure of DNA?

Watson and Crick

What type of chemical bond joins the bases of complementary DNA strands.

ionic

During Replication, _______ are the enzymes responsible for joining the nucletides of a new DNA strand together.

DNA polymerase

How many necluotides make up a codon?

three

After replication _______

each new DNA double helix consits of one old strand and one new one.

Evidence for the spiral nature of DNA came from _______.

x-ray crystalography studies

Which of the following enzymes is responsible for RNA synthesis?

RNA polymerase

What protects mRNA from attack by cytoplasmic enzymes?

a cap and tail

Viruses that infect bacteria are ____.

bacteriophages

How can bacteriophase DNA be spread from cell to cell without causing death?

via a lysogenic cycle

The expressed (coding) regions of eukaryotic genes are called _____.

exons

The region of DNA where RNA synthesis begines is the_____

promoter

The first basic idea of evolutionary adaptation can be traced back to ______

Lamark

Which of the following is a component of the fossil record?

dinosaur footprints

Which one of the following statements is true?

Natural selection works on variate already present in population

Reserach on flat-tailed horned lizards demonstrated that natural selection favored lizards that ____.

had the longest horns on the rear of the skull

The modern syntesis was a fusion of _______.

genetics and evolutionary biology

The oldest known follils are about ______years ago.

35 million

________ is the study of fossils.

paleontology

While on the beagle, darwin was influenced by a book by Charles Lyell that suggested that earty was _____ and sculpted by geological processes that ____ today.

old..... continue

The smallest unit of conversion is the _______.

population

The founder effect differs from a population bottleneck in that the founder effect ______.

involves the isolation of a small colony of individuals from a larger population

ON what basis are populations assigned to the same biology species

being able to interbreed and produce fertile offspring

The bioloical specials concept cannot be applied to ________

bacteria that only reporduce asexually

The current geological era is _____

cenozoic

What name is given to the single supercontinent that formed near the end of the palezoic?

pangea

Dinosaurs were extict by the end of the ______.

cretaceous

A pereiod of mass extinction is often followed by _______.

explosive diversification

________ is the study of biological diversity and relationships of organsims, past and present

systematics

Non branching evolution is _______

linear evolution

The science of naming, identifying, and classifying organisms is ________

taxonomy

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