Bio 1000 Midterm Exam Questions and Correct
Answers
1. Carbons linked by alternating double and single bonds
Shape of Pigments
Nightvision
In your eye, "rods" enable
Color vision
In your eye, "cones" enable
Cones house disks that contain light absorbing pigment
How can cone cells interpret colors?
Cone cells allow different wavelengths of light to be interpreted as color in the brain
How can cone cells interpret different colors?
opsins
Trichromatic vision is the result of three different...
1. Short wave sensitive (SWS): short wavelengths (blue light)
2. Medium Wave Sensitive (MWS): Medium wavelengths (green light)
3. Long wave sensitive (LWS): Long wavelengths (red light)
The three different opsins are:
,Protein; amino acids
What macromolecule is an opsin? Consequently, what is it's "building blocks"?
Only possesses SWS and MWS
Dichromatic vision
Unity
All organisms today were derived from a common ancestor
Diversity
Species change over time as a result of natural selection
variation and selection
How does evolution occur?
Variation
there is variation with every population in regard to inheritable traits
Advantage
organisms compete for limited resources and certain traits offer survival advantage
Reproduction
Organisms produce more offspring than can survive
1. SWS gene is located on chromosome 7
2. MWS and LWS are located on the X-chromosome
Where are opsin genes located?
MWS and LWS differ by only 3 different places in the amino acid sequence
, What two opsins are similar?
A duplicated segment of the MWS gene was duplicated and inserted into the
chromosome
How did the LWS evolve?
Mutation
What is the source for genetic variation?
1. All organisms are composed of one or more cells
2. The cell is the smallest unit that has properties of life
3. Cells arise only from the growth and division of preexisting cells
What are 3 components of the cell theory?
1. basic building blocks
2. Genetic information flow
3. plasma membrane
4. use and need for energy
What are 4 characteristics all cells share?
ribosomes
Site of protein synthesis
heterotrophs; autotrophs
How is carbon obtained?
Phototrophs, chemotrophs
How is energy obtained?
Answers
1. Carbons linked by alternating double and single bonds
Shape of Pigments
Nightvision
In your eye, "rods" enable
Color vision
In your eye, "cones" enable
Cones house disks that contain light absorbing pigment
How can cone cells interpret colors?
Cone cells allow different wavelengths of light to be interpreted as color in the brain
How can cone cells interpret different colors?
opsins
Trichromatic vision is the result of three different...
1. Short wave sensitive (SWS): short wavelengths (blue light)
2. Medium Wave Sensitive (MWS): Medium wavelengths (green light)
3. Long wave sensitive (LWS): Long wavelengths (red light)
The three different opsins are:
,Protein; amino acids
What macromolecule is an opsin? Consequently, what is it's "building blocks"?
Only possesses SWS and MWS
Dichromatic vision
Unity
All organisms today were derived from a common ancestor
Diversity
Species change over time as a result of natural selection
variation and selection
How does evolution occur?
Variation
there is variation with every population in regard to inheritable traits
Advantage
organisms compete for limited resources and certain traits offer survival advantage
Reproduction
Organisms produce more offspring than can survive
1. SWS gene is located on chromosome 7
2. MWS and LWS are located on the X-chromosome
Where are opsin genes located?
MWS and LWS differ by only 3 different places in the amino acid sequence
, What two opsins are similar?
A duplicated segment of the MWS gene was duplicated and inserted into the
chromosome
How did the LWS evolve?
Mutation
What is the source for genetic variation?
1. All organisms are composed of one or more cells
2. The cell is the smallest unit that has properties of life
3. Cells arise only from the growth and division of preexisting cells
What are 3 components of the cell theory?
1. basic building blocks
2. Genetic information flow
3. plasma membrane
4. use and need for energy
What are 4 characteristics all cells share?
ribosomes
Site of protein synthesis
heterotrophs; autotrophs
How is carbon obtained?
Phototrophs, chemotrophs
How is energy obtained?
