Photosynthesis ceases when leaves wilt, mainly because _____
A) the chlorophyll in wilting leaves is degraded
B) flaccid mesophyll cells are incapable of photosynthesis
C) stomata close, preventing carbon dioxide from entering the leaf
D) photolysis, the water-splitting step of photosynthesis, cannot occur when there is a water deficiency
E) accumulation of carbon dioxide in the leaf inhibits enzymes
Answer: C
You might also like to view...
What does not happen in the cytokinesis of plant cells?
A. Vesicles from the golgi apparatus move along the microtubules and fuse form cell plate. B. Cell wall forms between the two daughter cells.. C. The two nuclei are segregated into separate daughter cells. D. When the vesicles fuse, their membranes contribute to the formation of plasma membrane on either side of the cell plate. E. Formation of cleavage furrow to separate the cells.
What is gene regulation that occurs in a eukaryotic organism when the DNA is uncoiled and loosened from nucleosomes to bind transcription factors called?
a. epigenetic level of regulation b. post-transcriptional level of regulation c. translational level of regulation d. post-translational level of regulation
One product of the initial (first) reaction of the citric acid cycle is:
a. ATP. b. NADH. c. citrate. d. oxaloacetate. e. acetyl-CoA
63. The molecule that carries the message of the gene from the nucleus to the ribosome is A. DNA. B. tRNA. C. mRNA. D. rRNA. Bloom's Level: 1. Remember Learning Outcome: Define gene, transcription, translation. Section: 08.03 Section: 08.04 Topic: Molecular Biology 64. The molecule that carries the amino acid to the ribosome is A. DNA. B. tRNA. C. mRNA. D. rRNA. Bloom's Level: 1. Remember Learning Outcome: Define gene, transcription, translation. Section: 08.03 Section: 08.04 Topic: Molecular Biology 65. A molecule that is a component of a ribosome is A. DNA. B. tRNA. C. mRNA. D. rRNA. Bloom's Level: 1. Remember Learning Outcome: Define gene, transcription, translation. Section: 08.03 Section: 08.04 Topic: Molecular Biology 66. During
transcription, free nucleotides of RNA bond with ____ nucleotides. A. DNA B. other tRNA C. mRNA D. rRNA Bloom's Level: 1. Remember Learning Outcome: Define gene, transcription, translation. Section: 08.04 Topic: Molecular Biology 67. ____ code(s) for the placement of one amino acid. A. Three codons B. One nucleotide C. Three nucleotides D. One intron Bloom's Level: 1. Remember Learning Outcome: Accurately use the codon table to predict the amino acid sequence of a protein. Section: 08.02 Section: 08.04 Topic: Molecular Biology 68. The promoter sequence of DNA is located A. behind the initiator codon. B. ahead of the initiator codon. C. immediately ahead of the gene. D. behind the gene. Bloom's Level: 1. Remember Learning Outcome: Explain how promoters, transcription factors, and splicing affect transcription. Section: 08.04 Topic: Molecular Biology 69. This occurs when insertions or deletions cause the ribosome to read the wrong sets of three nucleotides. A. point mutation B. frameshift C. translocation D. transcription Bloom's Level: 2. Understand Learning Outcome: Provide examples of insertions, deletions, and frameshift mutations. Section: 08.06 Topic: Molecular Biology 70. If a drug interferes with the activities of transfer RNA, which one of the following is likely to occur? A. DNA will not be able to make copies of itself. B. Proteins will not be produced. C. Mutations will occur to the DNA. D. Messenger RNA will not be manufactured. Bloom's Level: 5. Evaluate Learning Outcome: Explain the use of mRNA and tRNA in the process of translation. Section: 08.04 Topic: Molecular Biology 71. Which of the following is necessary for DNA to make copies of itself? A. Ribosomes must be present. B. The cell must have an abundant supply of RNA nucleotides. C. The two strands of the DNA molecule must separate. D. Chromosomes must be synapsed. Bloom's Level: 1. Remember Learning Outcome: Describe DNA replication using base-pairing rules and DNA polymerase. Section: 08.02 Topic: Molecular Biology A. one B. five C. ten D. fifteen