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Photo depicts Earth from space.
This NASA image is a composite of several satellite-based views of Earth. To make the whole-Earth image, NASA scientists combine observations of different parts of the planet. (credit: NASA/GSFC/NOAA/USGS)

Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.

Test PDF eBook: 
Bio 3
Download Biology #3 Test PDF eBook
33 Pages
2014
English US
Educational Materials



Sample Questions from the Bio 3 Test

Question: What is the main protein in translation

Choices:

RNA polymerase

DNA polymerase

ligase

ribosome

endoplasmic reticulum

Question: In eukaryotic cells sequences of mRNA that are removed from an mRNA molecule before being translated are

Choices:

Anticodons

Introns

Terminators

Exons

Proteoms

Question: Which of the following happens to eukaryotic transcript prior to translation

Choices:

a cao is put on one end

a Poly-a tail is added to the other end

splicing

All of the Above

A and B

Question: A three base sequence (loop) in TRNA that is complementary to a sequence of three bases in mRNA is

Choices:

A codon

A terminator

An anticodon

A promoter

Question: In eukaryotes transcription takes place in

Choices:

the ribosome

the cytoplasm

the nucleus

the endoplasmic reticulum

Question: a tRNA molecule is "bilingual" because it binds to

Choices:

Codons of mRNA and amino acids

Promoters and terminators

Amino acids in DNA

DNA and mRNA codons

Promoters and Amino Acids

Question: The process used by cells to convert the mRNA "message" into a sequence of amino acids is

Choices:

Replicatio

Mitosis

transcription

Translation

Question: which protein is the main protein of transcription?

Choices:

RNA Polymerase

DNA polymerase

ligase

ribosomes

Question: energy conservation is an important reason cells have gene regulation; in other words, cells conserve energy by not making proteins when they don't need them

Choices:

True

False

Question: A change in the cells DNA sequence is:

Choices:

An operon

A mutation

Transcription

Translation

Replication

Question: The Central Dogma Refers

Choices:

To production of energy in cell

Genetic information passing from RNA to protein by transcription

To inheritance of traits between generations

to the flow of genetic information in cells

Genetic information passing from DNA to RNA by translation

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