biology 102 module 2 ( 4 versions)
questions with detailed answers
When comparing DNA and RNA, we find
adenine pairs with different bases in DNA and RNA.
In the sequence: DNA-(1) RNA-(2) protein, step (1) is called
transcription.
What is the role of isopropanol in the isolation of DNA and why do we keep the
isopropanol cold?
It precipitates out the DNA and slows its deterioration
Genes are made of
DNA
Complementary base pairs are held together by
hydrogen bonds.
Which of the following statements about genetics is true?
Differences among organisms reflect different nucleotide sequences in their DNA strand
of nucleotides.
All of the following are directly involved in translation EXCEPT
DNA
RNA carries information for protein synthesis from the DNA in the nucleus to the
ribosomes in the cytoplasm or on the RER. To get from the nucleus to the
cytoplasm, RNA must pass through pores in the envelope of the ________.
Nucleus
Which nitrogenous base(s) below is (are) NOT found in DNA?
Uracil
What color are the carbon atoms?
black/gray
Which of the choices is coded for by the shortest piece of DNA?
a tRNA having 75 nucleotides
Using the codon chart provided, list the amino acid sequence based on the DNA
sequence given. DNA sequence TGT AGA GAA GCC ACA GAG
Thr-Ser-Leu-Arg-Cys-Leu
Gene expression is
the flow of genetic information from genes to proteins.
GMO stands for
genetically modified organism
The word _____ is used to describe the fact that the two strands of nucleotides in
a DNA molecule run in opposite directions. The ribose molecules point upward in
one strand and downward in the other.
antiparallel
Transcription is the process of
synthesizing an RNA molecule using a DNA template.
Which of these is found in RNA but NOT in DNA?
,uracil
Which nitrogenous base is incorrectly paired with its match?
Both A and D
Match the DNA isolation steps to the changes you observed during the
experiment.
Formation of a thick sudsy foam - Add Detergent
Thickening of the filtered solution - Stirring after adding meat tenderize
Cloudy mass of threads - Ice-cold ethanol
None of these - Blending the onion
Match the letters on the diagram to the correct description.
Letter a - sugar
Letter b - covalent bond
Letter c - phosphate
Letter f - cytosine
Which of the following is TRUE of the genetic information in the cells of your
body?
The genetic information in almost all of your cells is identical.
RNA can be distinguished from DNA because RNA
All of these choices are correct.
If a bacterial protein has 30 amino acids, how many nucleotides are needed to
code for it?
90
Choose the correct pathway of information flow in the cell. (Hint: the Central
Dogma.)
DNA RNA protein
Write down the RNA that would be made from this DNA. Enter your answer with
no spaces and include the 3' and 5', correctly, of course.
3'CCCGGGTAA5'
5'GGGCCCAUU3'
The monomers of DNA and RNA are
nucleotides
What is the primary purpose of DNA in the metabolism of a cell? Relate this to the
central dogma of molecular biology.
To provide the genetic code instructions for proteins
Which molecule is incorrectly paired with its place on the "ladder" of DNA?
Steps - Deoxyribose
Both DNA and RNA
contain phosphate groups.
Match the DNA isolation steps to the changes in the cell.
Blending - Breaking rigid cell wall
Meat Tenderizer - Breakdown of proteins
,Detergent - Break down cell membrane
Ice-cold ethanol - Precipitate DNA into visible strands
Salt - Binds to DNA during blending
The process of copying genetic information from DNA to RNA is called
transcription
Click on the nitrogen atom tht is part of the hydrogen bond in thymine.
Second blue from the left
The primary sequence of amino acids in the structure of proteins is determined
by the
DNA
RNA is read in which direction?
5. 5' to 3'
What does a cell use exocytosis for?
to release substances from the cell
Which of the following is capable of converting light energy to chemical energy?
chloroplasts
Describe and order the steps to make a wet mount of your cheek cells. Mentally
note which steps were different from the Elodea wet mount steps (hint remember
the use of stains).
1. Put on gloves
2. Scrape cheek with a toothpick and rub onto slide
3. Stain check with methylene blue
4. Put cover slip on top of cheek cell specimen
As the total magnification increases, the field diameter _________
decreases
Match the cell structure or organelle to its function.
Ribosomes - Synthesize proteins
cytoskeleton - provide shape and stability inside the cell
plasma membrane - protects the cell from its environment
nucleus - an organelle that contains DNA
mitochondria - generates the cell's energy
IF the field size is 0.5 mm what is the cell size (length) of EACH cell in
(micrometer) um?
83 um
Prokaryotic as well as eukaryotic cells possess
ribosomes.
Choose the plant cell
square one
, The basic difference between a prokaryotic cell and a eukaryotic cell is that the
prokaryotic cell
lacks a nuclear envelope.
Distance across this image is 350 micrometers. What type cells are these and
what is their size?
bacteria, 5 micrometers
In metabolically active cells, you would expect to find a large number of
mitochondria.
All cells possess all the following components EXCEPT
nuclear membrane.
The Golgi packages materials into ________ for transport or export.The Golgi
packages materials into ________ for transport or export.
vesicles
Cells containing a nucleus are ________ and cells without a nucleus are
________.
eukaryotes; prokaryotes
What are the three domains of life? Choose the three from the list below.
archaea, eukarya, bacteria
Given this data, determine the objective lens power.
40x
How many cells would fit across the microscope field of view shown?
6
This is a drawing of a Euglena, a common pond organism. To which kingdom
does it belong?
protist
If the field diameter is 200 um and 100 cells fit across, the cell size is 0.2 um.
false
Unlike animal cells, plant cells have ________ and ________. Unlike plant cells,
animal cells have ________.
chloroplasts . . . cell walls . . . centrioles
A cell that lacks organelles is a(n)
prokaryotic cell.
Match each cell structure below to the description that best describes its
function.
Nucleus - contains DNA or Genetic Information
Endoplasmic Reticulum - plays a role in transporting molecules around the cell
Mitochondria - Manufactures the cell's energy (ATP)
What kind of cell is this? Given that the length of the picture is 500 um, the length
of one cell is about ________.
plant, 200 um
What are five structures every cell has?
Cytoskeleton
Ribosome
Cytoplasm
questions with detailed answers
When comparing DNA and RNA, we find
adenine pairs with different bases in DNA and RNA.
In the sequence: DNA-(1) RNA-(2) protein, step (1) is called
transcription.
What is the role of isopropanol in the isolation of DNA and why do we keep the
isopropanol cold?
It precipitates out the DNA and slows its deterioration
Genes are made of
DNA
Complementary base pairs are held together by
hydrogen bonds.
Which of the following statements about genetics is true?
Differences among organisms reflect different nucleotide sequences in their DNA strand
of nucleotides.
All of the following are directly involved in translation EXCEPT
DNA
RNA carries information for protein synthesis from the DNA in the nucleus to the
ribosomes in the cytoplasm or on the RER. To get from the nucleus to the
cytoplasm, RNA must pass through pores in the envelope of the ________.
Nucleus
Which nitrogenous base(s) below is (are) NOT found in DNA?
Uracil
What color are the carbon atoms?
black/gray
Which of the choices is coded for by the shortest piece of DNA?
a tRNA having 75 nucleotides
Using the codon chart provided, list the amino acid sequence based on the DNA
sequence given. DNA sequence TGT AGA GAA GCC ACA GAG
Thr-Ser-Leu-Arg-Cys-Leu
Gene expression is
the flow of genetic information from genes to proteins.
GMO stands for
genetically modified organism
The word _____ is used to describe the fact that the two strands of nucleotides in
a DNA molecule run in opposite directions. The ribose molecules point upward in
one strand and downward in the other.
antiparallel
Transcription is the process of
synthesizing an RNA molecule using a DNA template.
Which of these is found in RNA but NOT in DNA?
,uracil
Which nitrogenous base is incorrectly paired with its match?
Both A and D
Match the DNA isolation steps to the changes you observed during the
experiment.
Formation of a thick sudsy foam - Add Detergent
Thickening of the filtered solution - Stirring after adding meat tenderize
Cloudy mass of threads - Ice-cold ethanol
None of these - Blending the onion
Match the letters on the diagram to the correct description.
Letter a - sugar
Letter b - covalent bond
Letter c - phosphate
Letter f - cytosine
Which of the following is TRUE of the genetic information in the cells of your
body?
The genetic information in almost all of your cells is identical.
RNA can be distinguished from DNA because RNA
All of these choices are correct.
If a bacterial protein has 30 amino acids, how many nucleotides are needed to
code for it?
90
Choose the correct pathway of information flow in the cell. (Hint: the Central
Dogma.)
DNA RNA protein
Write down the RNA that would be made from this DNA. Enter your answer with
no spaces and include the 3' and 5', correctly, of course.
3'CCCGGGTAA5'
5'GGGCCCAUU3'
The monomers of DNA and RNA are
nucleotides
What is the primary purpose of DNA in the metabolism of a cell? Relate this to the
central dogma of molecular biology.
To provide the genetic code instructions for proteins
Which molecule is incorrectly paired with its place on the "ladder" of DNA?
Steps - Deoxyribose
Both DNA and RNA
contain phosphate groups.
Match the DNA isolation steps to the changes in the cell.
Blending - Breaking rigid cell wall
Meat Tenderizer - Breakdown of proteins
,Detergent - Break down cell membrane
Ice-cold ethanol - Precipitate DNA into visible strands
Salt - Binds to DNA during blending
The process of copying genetic information from DNA to RNA is called
transcription
Click on the nitrogen atom tht is part of the hydrogen bond in thymine.
Second blue from the left
The primary sequence of amino acids in the structure of proteins is determined
by the
DNA
RNA is read in which direction?
5. 5' to 3'
What does a cell use exocytosis for?
to release substances from the cell
Which of the following is capable of converting light energy to chemical energy?
chloroplasts
Describe and order the steps to make a wet mount of your cheek cells. Mentally
note which steps were different from the Elodea wet mount steps (hint remember
the use of stains).
1. Put on gloves
2. Scrape cheek with a toothpick and rub onto slide
3. Stain check with methylene blue
4. Put cover slip on top of cheek cell specimen
As the total magnification increases, the field diameter _________
decreases
Match the cell structure or organelle to its function.
Ribosomes - Synthesize proteins
cytoskeleton - provide shape and stability inside the cell
plasma membrane - protects the cell from its environment
nucleus - an organelle that contains DNA
mitochondria - generates the cell's energy
IF the field size is 0.5 mm what is the cell size (length) of EACH cell in
(micrometer) um?
83 um
Prokaryotic as well as eukaryotic cells possess
ribosomes.
Choose the plant cell
square one
, The basic difference between a prokaryotic cell and a eukaryotic cell is that the
prokaryotic cell
lacks a nuclear envelope.
Distance across this image is 350 micrometers. What type cells are these and
what is their size?
bacteria, 5 micrometers
In metabolically active cells, you would expect to find a large number of
mitochondria.
All cells possess all the following components EXCEPT
nuclear membrane.
The Golgi packages materials into ________ for transport or export.The Golgi
packages materials into ________ for transport or export.
vesicles
Cells containing a nucleus are ________ and cells without a nucleus are
________.
eukaryotes; prokaryotes
What are the three domains of life? Choose the three from the list below.
archaea, eukarya, bacteria
Given this data, determine the objective lens power.
40x
How many cells would fit across the microscope field of view shown?
6
This is a drawing of a Euglena, a common pond organism. To which kingdom
does it belong?
protist
If the field diameter is 200 um and 100 cells fit across, the cell size is 0.2 um.
false
Unlike animal cells, plant cells have ________ and ________. Unlike plant cells,
animal cells have ________.
chloroplasts . . . cell walls . . . centrioles
A cell that lacks organelles is a(n)
prokaryotic cell.
Match each cell structure below to the description that best describes its
function.
Nucleus - contains DNA or Genetic Information
Endoplasmic Reticulum - plays a role in transporting molecules around the cell
Mitochondria - Manufactures the cell's energy (ATP)
What kind of cell is this? Given that the length of the picture is 500 um, the length
of one cell is about ________.
plant, 200 um
What are five structures every cell has?
Cytoskeleton
Ribosome
Cytoplasm
