The letter "D" in the above figure represents
which teeth?
a. incisors
b. molars
c. canines
d. premolars
e. none of these
A
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In 1937, two German biochemists published a paper proposing the following reactions as part of the glucose oxidation. citrate isocitrate -ketoglutarate succinate fumarate malate oxaloacetate
Adding succinate, fumarate, or malate to thin slices of tissue increased oxygen consumption, supporting the hypothesis that these molecules are intermediates in the process. However, a puzzling observation was that intermediates were still present in the reaction mixture at the end of the experiment. If they are intermediates, then they should be consumed as the next product in the pathway is formed. What explains this observation? A. Succinate, fumarate, and malate are not reactants but catalysts, and catalysts are not consumed in the process. B. Succinate, fumarate, and malate are constantly regenerated in the citric acid pathway. C. Succinate, fumarate, and malate increase metabolism and therefore oxygen consumption, but they are not directly part of the glucose oxidation pathway.
Which of the following is not a characteristic of DNA?
A) complementarity B) composed of nucleotides C) contains ribose D) antiparallel strands E) double-stranded
In eukaryotic cells,
a. the bulk of the control of gene expression is at the level of transcription just like in prokaryotes b. mRNAs tend to remain stable for about the same length of time c. mRNAs can have their activities altered through modifications such as phosphorylation d. promoters of genes that are transcribed remain part of heterochromatin e. genes that are involved in similar processes are clustered together in operons
Explain what genetic ‘trick’ could have confounded Mendel is his recognition of segregation? What will be an ideal response?