Which one of the following is TRUE regarding cellular respiration?
A) begins with the electron transport system
B) requires the presence of oxygen
C) results in the complete breakdown of ATP
D) produces carbon dioxide and oxygen
E) results in the synthesis of large sugar molecules
B
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The vascular cylinder of a root consists of ________
a. endodermis b. root apical meristem and the root cap c. cortex and pith d. primary xylem and phloem
Island populations are more vulnerable to
__________ than their mainland counterparts. a. storms b. disease c. droughts d. genetic drift e. all of these
What explanation is generally given for lethality of monosomic individuals?
A) The gametes of monosomic individuals cannot undergo meiosis, and this is lethal. B) Monosomy may unmask recessive lethals that are tolerated in heterozygotes carrying the wild-type allele. C) Cells count the number of chromosomes they have and will undergo apoptosis when the chromosome number is incorrect. D) The loss of a single chromosome is not generally lethal, unless the individual is inbred. E) Monosomic chromosomes cannot undergo mitosis correctly.
Which of the following is not true about transcription factors?
A. Transcription factors are considered external cell regulators. B. Specialization of cells is determined/influenced by which transcription factors are active in the cell. C. There are many different types of transcription factors. D. Transcription factors are DNA-binding proteins. E. Genes code for transcription factors.