Biology 15 Genes and Proteins MCQ

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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.

Unit 3. Genetics

Chapter 15: Genes and Proteins MCQ Multiple Choices Questions Quiz Test Bank

15.1 The Genetic Code

15.2 Prokaryotic Transcription

15.3 Eukaryotic Transcription

15.4 RNA Processing in Eukaryotes

15.5 Ribosomes and Protein Synthesis

Quiz PDF eBook: 
Biology 15 Genes and Proteins MCQ
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10 Pages
2015
English US
Educational Materials



Sample Questions from the Biology 15 Genes and Proteins MCQ Quiz

Question: In any given species, there are at least how many types of aminoacyl tRNA synthetases?

Choices:

20

40

100

200

Question: What transcripts will be most affected by low levels of a-amanitin?

Choices:

18S and 28S rRNAs

pre-mRNAs

5S rRNAs and tRNAs

other small nuclear RNAs

Question: Which pre-mRNA processing step is important for initiating translation?

Choices:

poly-A tail

RNA editing

splicing

7-methylguanosine cap

Question: The -10 and -35 regions of prokaryotic promoters are called consensus sequences because ________.

Choices:

they are identical in all bacterial species

they are similar in all bacterial species

they exist in all organisms

they have the same function in all organisms

Question: Which subunit of the E. coli polymerase confers specificity to transcription?

Choices:

a

ß

ß'

s

Question: How many nucleotides are in 12 mRNA codons?

Choices:

12

24

36

48

Question: Which feature of promoters can be found in both prokaryotes and eukaryotes?

Choices:

GC box

TATA box

octamer box

-10 and -35 sequences

Question: What processing step enhances the stability of pre-tRNAs and pre-rRNAs?

Choices:

methylation

nucleotide modification

cleavage

splicing

Question: The AUC and AUA codons in mRNA both specify isoleucine. What feature of the genetic code explains this?

Choices:

complementarity

nonsense codons

universality

degeneracy

Question: The RNA components of ribosomes are synthesized in the ________.

Choices:

cytoplasm

nucleus

nucleolus

endoplasmic reticulum

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Source:  OpenStax College. Download for free at http://cnx.org/content/col15448/latest/
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