Which of the following is most likely to have a small protein called ubiquitin attached to it?
  • The genes share a single common enhancer, which allows appropriate activators to turn on their transcription at the same time
  • It is an unevenly distributed mixture of mRNA, proteins, organelles, and other substances.
  • a cyclin protein, that usually acts in G1, in a cell that is in G2
  • amplification of a proto-oncogene and inactivation of a tumor-suppressor gene
The product of the p53 gene _____.
  • A. (the beginning of the cycle)
  • inhibits the cell cycle
  • binds to tryptophan
  • excessive cell division
Which of the following would be most likely to lead to cancer?
  • It is an unevenly distributed mixture of mRNA, proteins, organelles, and other substances.
  • The genes share a single common enhancer, which allows appropriate activators to turn on their transcription at the same time
  • amplification of a proto-oncogene and inactivation of a tumor-suppressor gene
  • A. (the beginning of the cycle)
Imagine that you've isolated a yeast mutant that contains histones resistant to acetylation. What phenotype do you predict for this mutant?
  • The mutant will show low levels of gene expression.
  • Anterior structures would form in both ends of the embryo.
  • amplification of a proto-oncogene and inactivation of a tumor-suppressor gene
  • The genes share a single common enhancer, which allows appropriate activators to turn on their transcription at the same time
Which of the following mechanisms is (are) used to coordinate the expression of multiple, related genes in eukaryotic cells?
  • amplification of a proto-oncogene and inactivation of a tumor-suppressor gene
  • It is an unevenly distributed mixture of mRNA, proteins, organelles, and other substances.
  • The genes share a single common enhancer, which allows appropriate activators to turn on their transcription at the same time
  • The mutant will show low levels of gene expression.
_____ bind(s) to DNA enhancer regions.
  • inhibits the cell cycle
  • A. (the beginning of the cycle)
  • Activators
  • C and D
Forms of the Ras protein found in tumors usually cause which of the following?
  • amplification of a proto-oncogene and inactivation of a tumor-suppressor gene
  • A. (the beginning of the cycle)
  • binds to tryptophan
  • excessive cell division
It is possible for a cell to make proteins that last for months; hemoglobin in red blood cells is a good example. However, many proteins are not this long-lasting; they may be degraded in days, hours, or even minutes. What is the advantage of short-lived proteins?
  • It is an unevenly distributed mixture of mRNA, proteins, organelles, and other substances.
  • Anterior structures would form in both ends of the embryo.
  • The genes share a single common enhancer, which allows appropriate activators to turn on their transcription at the same time
  • Short-lived proteins enable the cells to control their activities precisely and efficiently.
Which of these directly bind(s) to the promoter?
  • C and D
  • It is an unevenly distributed mixture of mRNA, proteins, organelles, and other substances.
  • amplification of a proto-oncogene and inactivation of a tumor-suppressor gene
  • A. (the beginning of the cycle)
How are genes coordinately controlled in eukaryotic cells?
  • It is an unevenly distributed mixture of mRNA, proteins, organelles, and other substances.
  • amplification of a proto-oncogene and inactivation of a tumor-suppressor gene
  • 1. Coordinately controlled genes in eukaryotic cells share a set of control elements.2. Coordinately controlled genes in eukaryotic cells are activated by the same chemical signals.
  • Different genes are expressed so that different proteins are produced.
The trp repressor blocks transcription of the trp operon when the repressor _____.
  • inhibits the cell cycle
  • Anterior structures would form in both ends of the embryo.
  • excessive cell division
  • binds to tryptophan
The bicoid gene product is normally localized to the anterior end of the embryo. If large amounts of the product were injected into the posterior end as well, which of the following would occur?
  • alternative splicing
  • The mutant will show low levels of gene expression.
  • Short-lived proteins enable the cells to control their activities precisely and efficiently.
  • Anterior structures would form in both ends of the embryo.
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