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Duffusion of particles througha membrane by means of a carrier molecule is called? A. Pinocytosis B. Osmosis C. Facilitated Diffusion D> Dialysis - correct answer>>A. Pinocytosis Diffusion requires? A. a semipermiable membrane B. A concentration gradient C. Ions D. None of the above - correct answer>>D. None of the above All of the following are examples of passive transport except? - correct answer>>A. Filtration B. Osmosis C. Endocytosis D. Dialysis C. Endocytosis A Saline solution that contains a higher concentration of salt than red blood cells would be?
A. Isotonic B. Hypotonic C. Hyptertonic D. Hydrostatic - correct answer>>C. Hypertonic Materials can be moved from a low concentration to high concentration through? A. Facilitated diffusion B. Filtration C. Osmosis D. Active Transport - correct answer>>D. Active Transport Which of the following is not true of diffusion? A. Uses cellular energy B. Can occur in living and non-living cells C. May occur both into and out of the cells D. Energy course is cellular - correct answer>>A. Uses cellular energy 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? A. Endocytosis
D. Two potassium ions are taken out of the cell. - correct answer>>C. Three potassium ions are taken into the cell Two solutions of different concentrations of glucose are separated by a membrane that allows both glucose and water the pass through. When dynamic equilibrium is reached, there will be: A. no movement of water B. Movement of glucose but not water C. Movement of water but not glucose D. An even exchange of material across the membrane - correct answer>>D. An even exchange of material across the membrane Phagocytosis is an example of A. Exocytosis B. endocytosis C, Passive transport D. faciliated diffusion - correct answer>>B. endocytosis Water will move through the cell membrane by A. Dialysis B. Diffusion C.Facilitated diffusion D. Osmosis - correct answer>>B. Diffusion
NaCl would move through the cell membrane in which direction? A. Both into and out of the cell B. Into the cell C. Out of the cell D. Neither in or out of the cell - correct answer>>A. Both into and out of the cell The small water channels in the cell memrane are called A. Phopholipid molecules B. Transport pumps C. Aquaporins D. Transport Vesicles - correct answer>>C. Aquaporins If a cell were placed in a hypotonic solution A. There would be a net gain of water into the cell B. There would be a net loss of water out of the cell C. No water would move into or out of the cell D. water would move into and out of the cell in equal amounts - correct answer>>A. There would be a net gain of water into the cell If a cell were placed in a hypertonic solution
B. Osmosis C. Phagocytosis D. Pinocytosis - correct answer>>B. Osmosis The englufing of microbes by white blood cells is an example of: A. Pinocytosis B. Exocytosis C. Phagocytosis D. "cell drinking:" - correct answer>>C. Phagocytosis A hypertonic solution contains _____________ concentration of solute ________________ the cell. A. A greater; than B. The same; as C. A lesser; than D. None of the above is correct - correct answer>>A. A greater; than The force of a fluid pushing against the surface could be described as _______ pressure A. Facilitated B. Hydrostatic C. Hypostatic
D. Diffused - correct answer>>B. Hydrostatic If 20 % glucose solution were seperated from 10% glucose solution by permeable membrane A. Glucose would move from the 20% solution to the 10% solution B. Water would move from the 10% solution to the 20% solution C. Water would move from the 20% solution to the 10 % solution D. Both A and B would occur - correct answer>>D. Both A and B would occur The proteins in the cell membrane that can open and close are called: A. Enzymes B. Gated channels proteins C. Glycoproteins D. Both and B - correct answer>>B. Gated channels proteins Hydrostatic pressure in the blood is: A. generated by the contraction of the heart B. Generated by gravity C, Important to the function of the kidney D. All the above - correct answer>>D. All the above Gated channels in the cell membrane can be "opened" by
B. It does not require oxygen C. The energy is transferred to NADH D. It is able to get almost all of the energy out of the glucose molecule - correct answer>>D. It is able to get almost all of the energy out of the glucose molecule In aerobic respiration, the function of oxygen is to combine with: A. Pyruvic acid in glycolisis B. NADH in the citric Acid cycle C. electrons and hydrogen at the end of the electron transport system D. Lactic acid in glycolisis - correct answer>>C. electrons and hydrogen at the end of the electron transport system Which of the following is not true of enzymes? A. They increase the activation of a reaction B. They are unchanged by the chemical reaction C. They frequently require a cofactor or coenzyme to function D. All of the above are true - correct answer>>A. They increase the activation of a reaction molecule or other agent that alters enzyme function by changing the enzymes shape is called a(n) A. Cofactor B. Coenzyme
C. Allosteric effector D. Proenzyme - correct answer>>C. Allosteric effector Which of the following is not true of the citric acid cycle? A. Occurs in the mitochondria B. Directly releases 36 ATPs of energy C. Has acetyl CoA as starting product D. All of the above are true of the citric acid cycle - correct answer>>B. Directly releases 36 ATPs of energy Digestive enzymes belong to which group? A. Hydrases B. Phophorylating enzymes C. Hydrolases D. Isomerases - correct answer>>C. Hydrolases Which enzymes rearrange atoms within the molecule? A. Hydrases B. Phophorylating enzymes C.Oxidation-reduction enzymes D. Isomerases - correct answer>>D. Isomerases
A. They turn larger molecules into smaller ones B. They turn smaller molecules into larger ones C. They require energy from the cell D. Both B and C are true - correct answer>>D. Both B and C are true The pairing of bases of strand DNA is obligatory. If a strand of DNA were composed of the base sequence of ATCG, what would be the obligatory sequence of its opening base pairs? A.TAGC B.CGAT C. GCTA D. ATCG - correct answer>>A. TAGC Which of the following is not true of RNA? A. Its a single strand B. It contains uracil rather than thymine C. The obligatory base pairs are adenine and uracilm and guanine and cytosine D. It contains deoxyribose sugar - correct answer>>D. It contains deoxyribose sugar The correct order of the phases of Mitosis is; A. Anaphase, telophase, metaphase, prophase
B. Prophase, metaphase, anaphase, telophase C. prophase, anaphase, metaphase, telophase D. anaphase, metaphase, prophase, telophase - correct answer>>B. Prophase, metaphase, anaphase, telophase P- Primary M- Middle phase A- T- When the chromosomes align themselves across the equator of the spindle fibers, it is charecteristic of which phase of mitosis? A. Prophase B. Anaphase C. Metaphase D. Telophase - correct answer>>C. Metaphase MIddle Phase During which stage of mitosis do the centrioles move to the opposite poles of the cells A. Prophase B. Anaphase C. Metaphase D. Telophase - correct answer>>A. Prophase
A. codon B. anticodon C. Amino acid D. polypeptide bond - correct answer>>A. codon Transcription can be best described as the A. degradation of tRNA B. reading of mRNA codons by tRNA C. replication of DNA D. Synthesis of mRNA - correct answer>>D. Synthesis of mRNA Which of the following statements is true? A. Amino acid chains form DNA B. The site of transcription is within the nucleus, whereas the site of translation is in the cytoplasm. C. Uracil is present in DNA in place of thymine D. None of the above is true - correct answer>>B. The site of transcription is within the nucleus, whereas the site of translation is in the cytoplasm. An individual's entire set of DNA can be referred to as a: A. Chromosome B. Chromatid
C. Genome D. Cytokinesis - correct answer>>C. Genome Twenty-three chromosomes per cell in humans is referred to as A. Haploid B. Diploid C. Myoid D. Diod - correct answer>>A. Haploid Which of the following terms is synonymous with tumor? A. Anaplasia B. Hyperplasia C. Neoplasm D. Benign - correct answer>>C. Neoplasm 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? A. It contains deoxyribose sugar B. It could be found only in the nucleus C. It contains ribose sugar D. Both A and B are true - correct answer>>C. It contains ribose sugar
A. 16
B. 8
C. 32
D. None of the above - correct answer>>B. 8 a mature haploid male or female germ cell which is able to unite with another of the opposite sex in sexual reproduction to form a zygote. Basically how many chromosomes each parent carries In protein synthesis, some segments of the RNA transcript represent noncoding parts of the DNA. These are called: A. Exons B. Codons C. Introns D. Spliceosomes - correct answer>>C. Introns Introns are a segment of a DNA or RNA molecule which does not code for proteins and interrupts the sequence of genes. The membranous organelle in the cytoplasm that is able to replicate itself is the A. Golgi apparatus
B. Mitochondrion C. Lysosome D. Ribosome - correct answer>>B. Mitochondrion Which of the following is not a phase of mitosis? A. Prophase B. Metaphase C. Anaphase D. Interphase - correct answer>>D. Interphase PMAT The end product of the process of transcription is a(n) A. mRNA B. tRNA C. protein D. new DNA molecule - correct answer>>A. mRNA Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). DNA safely and stably stores genetic material in the nuclei of cells as a reference, or template. The end product of the process of translation is a(n)
