In non-cyclic photophosphorylation, where do electrons go after being released from photosystem II?
1.through an electron transport chain and into photosystem I
2.into photosystem I, through an electron transport chain, and then into NADPH
3.back into water
4.back into photosystem II
2
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What is a major difference between mitosis and meiosis I in a diploid organism?
A) Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis I. B) Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis II. C) DNA replication takes place prior to mitosis, but not before meiosis I. D) Only meiosis I results in daughter cells that contain identical genetic information.
Keller et al. (2013) Study Results
What will be an ideal response?
Why does the activation of a protein kinase that acts on initiation factor eIF2 block protein synthesis?
a) Phosphorylated eIF2 denatures. b) Phosphorylated eIF2 cannot exchange its GDP for GTP, which is required for eIF2 to participate in another round of translation initiation. c) Dephosphorylated eIF2 cannot exchange its GDP for GTP, which is required for eIF2 to participate in another round of translation initiation. d) Phosphorylated eIF2 is hyperactivated, blocking further translation. e) Phosphorylated eIF2 cannot exchange its GTP for GDP, which is required for eIF2 to participate in another round of translation initiation.
Exposer to air is necessary for microbial growth.
a. true b. false