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Flashcards in After Midterm Deck (57)
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1

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

Chlorplasts

2

The pigments that absorb light energy to drive photosynthese is/are

Chlorophyll and carotenoids

3

The product of photosynthesis are

glucose and oxygen

4

Specifically, molecules of chlorophyll are located in membranes of sacs called

Thylakoids

5

All of the following compounds are required at some state of green plant photosynthesis except...

oxygen

6

Where do the 02 released during photosynthesis come from?

H20

7

What is the sequence that accurately reflects the flow of electrons in photosynthesis?

H20-Photosystem II-Photosystem I-NADP

8

Which of the following is true about the light-dependent reactions?

Photosystem II generates ATP, while Photosystem I generates NADPH

9

If C4 photosynthesis prevents photorespriration, why haven't all plants evolved to use C4 pathways?

C4 is not advantageous to all climates

10

The correct structure of a DNA nucleotide is

Phosphate-5 carbon sugar-nitrogen base

11

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

False

12

During DNA replication the lagging strand synthesizes DNA discontinuously forming ______________ which are later connected by ____________.

Okazaki Fragments/DNA ligase

13

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

14

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

15

If the sequence of bases in a section of DNA is TAGGCTAA, what is the corresponding sequence of bases in mRNA?

AUCCGAUU

16

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

17

Transcription is the process of

synthesizing an RNA molecule using a DNA template

18

T/F: The process of daughter synthesis in DNA, and mRNA synthesis is always proceeded in the 5 to 3 direction.

True

19

Photosynthesis is a ___________ process over all

a Endergonic process

20

What is the enzyme needed for photosynthesis

rubisco

21

Photosystem II generates ____________ while photosystem I generates _____________.

ATP/NADPH

22

Light dependent reactions

captured by pigments in chloroplast; in the thykloid membrane; uses water to keep flow of electrons going

23

Light independent reactions

Can take place at night, not energy harvesting, captures CO2 (anabolism)

24

Fredic Griffith

Vacine for phmona; discovered that even after viruses were dead their DNA could still be harvested

25

M. Williams & R. Franklin

used x-rays to look at chromosomes: found a chromosome was long & thin and uniform, DNA was helical, repressing subuints

26

Watson & Crick

Provided theory for structure of DNA

27

Purines

A&C: Dual rings (always bonds with single rings)

28

Pyrimadines

T&G: Single rings always bind with double)

29

Anti-Parallel fashion:

Each side of the later of DNA was 5' to 3' bases

30

DNA replication

Needs: parental strand, free nucleotides and variety of enzymes to unwind and synthesize new strands