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1. Opinions can be scientifically tested
Answer:
Chlorophyll molecules donate electrons to an electron acceptor in the reaction center.
Explanation:
Light reaction of photosynthesis takes place in the reaction centre. Light reaction may comprises of several proteins such as pheophytin, chlorophyll and quinones which act as light absorbing molecules.
The light reaction is the core of photosynthesis that produces ATP and NADPH to carry out the dark reaction for the production of high energy carbon molecules. During light reaction light photons are captured by photosystems such as photosystem I and II of chlorophyll in green plants. This photon cause the excitation of electron that flows through the electron transport chain from higher potential to lower potential and energy released by it is utilized for creating the gradient potential of H+ ions across the membrane. This gradient potential difference of H+ ions is used for the production of ATP through ATP synthase complex.
So chlorophyll molecules donate electrons to electron acceptors through the excitation of electrons from light photons in the reaction center.
A mule gets 32 horse chromosomes from mom and 31 donkey chromosomes from dad for a total of 63 chromosomes.
Answer:
<u>Both</u>:
- The start codon is often AUG
<u>Eukaryotic cell only:</u>
- The larger subunit of the ribosome is 60s.
- The ribosomes initially binds the 5' end of mRNA.
<u>Prokaryotic cell only</u>:
- The ribosome is 70s
- Translation occurs in the cytoplasm
- There are multiple ribosome binding site
Explanation:
- AUG is the common start codon for both eukaryotic as well prokaryotic cells. In eukaryotic cell, it codes for methionine . While in prokaryotic cell, it codes for formyl methionine.
- In prokaryotic cell, ribosomes are found in cytoplasm, hence the translation occurs in cytoplasm.
- Eukaryotic ribosome consists of two subunits; 40s and 60s(larger subunit)
- Prokaryotic ribosomes have 70s ribososme, which consists of 50s and 20s subuints
- in eukaryotic cell, 40s ribosome initially binds to the cap at the 5' end of mRNA.
- Bacterial mRNA contain multiple ribosome binding sites.
