Flashcards in After Midterm Deck (57)
A biologist ground up some plant cells and then centrifuged the mixture. She obtained some organelles from the pellet in the test tube that took up CO2 and gave off 02. The organelles are most likely
The pigments that absorb light energy to drive photosynthese is/are
Chlorophyll and carotenoids
The product of photosynthesis are
glucose and oxygen
Specifically, molecules of chlorophyll are located in membranes of sacs called
All of the following compounds are required at some state of green plant photosynthesis except...
Where do the 02 released during photosynthesis come from?
What is the sequence that accurately reflects the flow of electrons in photosynthesis?
H20-Photosystem II-Photosystem I-NADP
Which of the following is true about the light-dependent reactions?
Photosystem II generates ATP, while Photosystem I generates NADPH
If C4 photosynthesis prevents photorespriration, why haven't all plants evolved to use C4 pathways?
C4 is not advantageous to all climates
The correct structure of a DNA nucleotide is
Phosphate-5 carbon sugar-nitrogen base
T/F: In Semiconservative replication a DNA molecule serves as a template for a new DNA molecule which either consists of both parental strands of DNA or both newly synthesized strands of DNA
During DNA replication the lagging strand synthesizes DNA discontinuously forming ______________ which are later connected by ____________.
Okazaki Fragments/DNA ligase
What is the difference between free and attached ribosomes?
Free ribosome are in the cytoplasm while attached ribosomes are anchored to the endoplasmic reticulum. Free ribosomes produce proteins that remain in the cytosol while attached ribosomes produce proteins that may be exported from the cell
What is the interaction between the ER, ribosomes, and Golgi bodies in the export of protein from the cell?
Ribosomes manufacture proteins which travel through the ER to be packaged by the Golgi bodies for export
If the sequence of bases in a section of DNA is TAGGCTAA, what is the corresponding sequence of bases in mRNA?
The function of the promoter is
to signal the RNA polymerase where to start transcribing the DNA, to signal the RNA polymerase which strand of DNA to read
Transcription is the process of
synthesizing an RNA molecule using a DNA template
T/F: The process of daughter synthesis in DNA, and mRNA synthesis is always proceeded in the 5 to 3 direction.
Photosynthesis is a ___________ process over all
a Endergonic process
What is the enzyme needed for photosynthesis
Photosystem II generates ____________ while photosystem I generates _____________.
Light dependent reactions
captured by pigments in chloroplast; in the thykloid membrane; uses water to keep flow of electrons going
Light independent reactions
Can take place at night, not energy harvesting, captures CO2 (anabolism)
Vacine for phmona; discovered that even after viruses were dead their DNA could still be harvested
M. Williams & R. Franklin
used x-rays to look at chromosomes: found a chromosome was long & thin and uniform, DNA was helical, repressing subuints
Watson & Crick
Provided theory for structure of DNA
A&C: Dual rings (always bonds with single rings)
T&G: Single rings always bind with double)
Each side of the later of DNA was 5' to 3' bases