Testing Your Recall
- Production of more than one phenotypic trait by a single gene is called a. pleiotropy.
- genetic determinism.
- genetic recombination.
- When a ribosome reads a codon on mRNA, it must bind to the_of a corresponding tRNA.
- start codon b. stop codon c. intron d. exon e. anticodon
- The normal functions of a liver cell— synthesizing proteins, detoxifying wastes, storing glycogen, and so forth—are done during its a. anaphase.
- G1 phase.
- G2 phase.
- synthesis phase.
Saladin: Anatomy & I 4. Genetics and Cellular I Text I © The McGraw-Hill
Physiology: The Unity of Function Companies, 2003 Form and Function, Third Edition
154 Part One Organization of the Body
- Two genetically identical strands of a metaphase chromosome, joined at the centromere, are its a. kinetochores.
- sister chromatids.
- homologous chromatids.
- Which of the following is not found in DNA?
- thymine b. phosphate c. cytosine d. deoxyribose e. uracil
- Genetic transcription is performed by a. ribosomes.
- RNA polymerase.
- DNA polymerase.
- A chaperone comes into play in a. the folding of a new protein into its tertiary structure.
- keeping DNA organized within the nucleus.
- escorting sister chromatids to opposite daughter cells during mitosis.
- repairing DNA that has been damaged by mutagens.
- preventing malignant cells from metastasizing.
- An allele that is not phenotypically expressed in the presence of an alternative allele of the same gene is said to be a. codominant.
- lacking penetrance.
- Semiconservative replication occurs during a. transcription.
- posttranslational modification.
- the S phase of the cell cycle.
- Mutagens sometimes cause no harm to cells for all of the following reasons except a. some mutagens are natural, harmless products of the cell itself.
- peroxisomes detoxify some mutagens before they can do any harm.
- the body's DNA repair mechanisms detect and correct genetic damage.
- change in a codon does not always change the amino acid encoded by it.
- some mutations change protein structure in ways that are not critical to normal function.
- The cytoplasmic division at the end of mitosis is called_.
- The alternative forms in which a single gene can occur are called
- The pattern of nitrogenous bases that represents the 20 amino acids of a protein is called the_.
- Several ribosomes attached to one mRNA, which they are all transcribing, form a cluster called a/an_.
- The enzyme that produces pre-mRNA from the instructions in DNA is
- Newly synthesized proteins may be escorted to their destination in a cell by other proteins called_.
- At prophase, a cell has_
chromosomes,_chromatids, and_molecules of DNA.
- The cytoplasmic granule of RNA and protein that reads the message in mRNA is a_.
- Cells are stimulated to divide by chemical signals called_.
- All chromosomes except the sex chromosomes are called_.
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.
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