Chapter 9

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

there are how many different types of amino acids

20

the genetic code is made up of units consisting of how many nucleotides

3

how many different RNA codons are listed on the Genetic Code chart

64

if the fourth base from the left (C) in RNA were deleted, what would the new 3rd codon be?

CUG

the two steps of transCription followed by transLation

describe the flow of genetic information

Of all the different codons that exist, three of them

do not specify a particular amino acid and provide instructions such as STOP

the portion of the DNA mol that is NOT translated and is a non-coding portion of DNA is called

exons

the portion of the DNA molecule that is translated is composed of

exons

what stage of translation occurs when ribosomal subunits & tRNAs converge around a mRNA transcript

initiation

which event of translation is shown in the figure

initiation

which stage of transLation is shown in the figure

initiation

a gene mutation

is described by all of these

Before messenger RNA is mature

a cap and a tail are provided

Ricin is

a substance found in castor bean seeds & a protein that inactivates ribosomes

Frameshift mutations may involve

addition or deletion of one or more base pairs

which of the following statements is true

all of these are true

during the termination stage

all of these occur

four of the five answers listed below are components of a nucleotide select the EXCEPTION

amino acid

a polysome is

an mRNA molecule with several ribosomes attached

the relationship between strands of RNA & DNA is

complementary

ribosomal subunits

coverage only when mRNA is to be translated

All the different kinds of RNA are transcribed in the

nucleus

DNA & RNA are alike in their

none of these

which of the following carries amino acids to the ribosomes

tRNA

if the 4th base from the left (C) in RNA were deleted, what would the new 4th codon be

AGG

which event occurs during the elongation stage

Peptide bonds form, and anticodons bind to complementary codons.

the helix structure on the right of the figure represents

RNA

which of the following dominates in the process of transcription

RNA polymerase

If the DNA triplets were ATG-CGT, the mRNA codons are

UACGCA

what amino acid is carried by the 2nd anti-codon in the figure

histine

Ricin is toxic because it

inactivates ribosomes

in this depiction of transCription, the ____ strand is_____ because it ______.

lower; RNA; is single-stranded

When a gene transcription occurs, which of the following is produced?

messenger RNA

___ molecules carry protein-assembly instructions from the nucleus to the cytoplasm

messenger RNA

the 1st amino acid of a new polypeptide chain is

methionine

the sequence of amino acids specified by the mRNA codons AUGCGUCCA is

methionine-arginine-proline

the structure in the figure depicts which of the following

multiple ribosomes on a strand of mRNA

transcription starts at a region of DNA called a(n)

promoter

the form of RNA that carries the code from DNA to the site of protein assembly is called

transfer RNA

if the DNA nucleotides read ATGCGTGAC, the amino acid sequence of the resulting polypeptide would be

tyrosine-alanine-leucine


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