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SCI221-05

Week 3

QuestionAnswer
Diffusion of particles through a membrane by means of a carrier molecule is called: pinocytosis. osmosis. facilitated diffusion. dialysis. facilitated diffusion.
When the chromosomes align themselves across the equator of the spindle fibers, it is characteristic of which phase of mitosis? Prophase Anaphase Metaphase Telophase Metaphase
A saline solution that contains a higher concentration of salt than a red blood cell would be: isotonic. hypotonic. hypertonic. hydrostatic. hypertonic
If a sequence of nitrogen bases in nucleic acid were A-U-C-G-A, which of the following would be true about the nucleic acid? It contains deoxyribose sugar. It could be found only in the nucleus. It contains ribose sugar. Both A and B are true. It contains ribose sugar.
Which of the following terms is synonymous with tumor? Anaplasia Hyperplasia Neoplasm Benign Neoplasm
Which of the following is not true of RNA? It is a single strand. It contains uracil rather than thymine. The obligatory base pairs are adenine and uracil, and guanine and cytosine. It contains deoxyribose sugar. It contains deoxyribose sugar.
Two solutions of different concentrations of glucose are separated by a membrane that allows both glucose and water to pass through. When dynamic equilibrium is reached, there will be: no movement of water or glucose. movement of glucose but not wate an even exchange of material across the membrane.
The small water channels in the cell membrane are called: phospholipid molecules. transport pumps. aquaporins. transport vesicles. aquaporins.
The physical process by which water and solute move through a membrane when a hydrostatic pressure gradient exists across the membrane is the process of: dialysis. osmosis. diffusion. filtration. filtration.
Phagocytosis is an example of: exocytosis. endocytosis. passive transport. facilitated diffusion. endocytosis.
Which of the following is not true of diffusion? Uses cellular energy Can occur in living and nonliving cells May occur both into and out of the cell Uses cellular energy
During which stage of mitosis do the centrioles move to the opposite poles of the cell? Prophase Metaphase Anaphase Telophase Prophase
Twenty-three chromosomes per cell in humans is referred to as: haploid. diploid. myoid. dioid. haploid.
NaCl would move through the cell membrane in which direction? Both into and out of the cell Into the cell Out of the cell Neither into nor out of the cell Both into and out of the cell
Transcription can be best described as the: degradation of tRNA. reading of mRNA codons by tRNA. replication of DNA. synthesis of mRNA. synthesis of mRNA.
Which is true about the sodium and potassium pump? Two sodium ions are taken into the cell. Three sodium ions are taken out of the cell. Three potassium ions are taken into the cell. Two potassium ions are taken out of the cell. Three sodium ions are taken out of the cell.
A membrane carrier structure attracts a solute to a binding site, changes shape, and releases the solute on the other side of the cell membrane. This describes the process of: endocytosis. the sodium and potassium pump. channel-mediated transport. carrier-mediated transport.
Which of the following statements is true? Amino acid chains form DNA. The site of transcription is within the nucleus, whereas the site of translation is in the cytoplasm. Uracil is present in DNA in place of thymine. None of the above is true The site of transcription is within the nucleus, whereas the site of translation is in the cytoplasm.
Water will move through the cell membrane by: dialysis. pumps. facilitated diffusion. osmosis. osmosis.
An individual’s entire set of DNA can be referred to as a: chromosome. chromatid. genome. cytokinesis. genome.
Created by: mecy1980
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