What is the result of recombination (crossing over) during meiosis?
A) It allows the cell to complete DNA replication.
B) It ensures retention of genetic information and helps to preserve cell characteristics.
C) It eliminates unused genes by removing them.
D) It binds homologous chromosomes tightly, so they do not accidentally separate.
E) It creates chromosomes that are a new combination of paternal and maternal material.
Answer: E
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Why is the proteome larger than the genome?
A. Proteins may be modified by covalent addition of a variety of molecules B. Not all genes are expressed in all cells at the same time C. Each gene will produce multiple mRNAs which will produce multiple proteins so the ratio of the number of protein molecules the number of genes is greater than
What type of thinking is required?
What will be an ideal response?
Which of the following phrases would most
likely be used in a discussion of homeostasis? a. respond to environmental stimuli b. limited range of variation c. rapid energy turnover d. cycle of elements e. structural and functional units of life
Each amino acid is encoded by only one mRNA codon
a. True b. False