Which one of the following do NOT apply to eukaryotic cells?
A. contain 80S ribosomes
B. have histones
C. have circular chromosomes
D. exhibit growth via mitosis
Ans: C. have circular chromosomes
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Crossing over is one of the most important events in meiosis because
a. it produces new combinations of alleles on chromosomes. b. homologous chromosomes must be separated into different daughter cells. c. the number of chromosomes allotted to each daughter cell must be halved. d. homologous chromatids must be separated into different daughter cells. e. it decreases genetic diversity.
Organisms, such as forams, move by pseudopodia and feed by phagocytosis. Thess organisms are classified as __________________protozoa.
A. bimodal B. amoeboid C. ciliated D. flagellated E. apicomplexan
Proteins that regulate gene expression by directly binding to the DNA are known as _____
a. transcription factors b. translation factors c. transposable elements d. methylation e. phosphorylation
A DNA molecule that can accept foreign DNA and be replicated inside a host cell is known as a ____
a. genetic probe b. DNA library c. recombinant DNA d. cloning vector e. restriction enzyme