Cells Practice Exam

Answer the multiple choice questions on the cantors sheet. Select the one choice that best answers the question. Answer the short answer questions in the space provided at the end of the exam. 1 . Which of the following is the SMALLEST? A. A bacterium b. A ribosome c. A hexes sugar d. A water molecule e. A yeast cell 2. The four main families of small inorganic molecules in cells are a. Salts, sugars, fatty acids, amino acids, nucleotides b. Sugars, fatty acids, amino acids, nucleotides c. Salts, sugars, water, fatty acids d. Sugars, fatty acids, alcohols, nucleotides 3.

In order to distinguish the layers of a cell membrane you would use an electron microscope because: a. It operates in a vacuum b. It can magnify the specimen 500,000 times c. It has the resolving power needed d. Light cannot penetrate membranes 4. Polar covalent bonds: a. Are found in molecules like CHI b. Account for the interaction among water molecules c. Are found in hydrophobic molecules d. Are a variant of an ionic bond 5. Responsible for cell movements in eukaryotic cells: a. Ribosome b. Lissome c. Cytokines d. Chloroplasts e. Googol apparatus 6. An organelle/structure common to prokaryote and eukaryotic cells: . Dictionary c. Cell wall d. Lissome e. More than one of these is correct 7. If a microscope had a limit of resolution of 0. 2 mm, which of the following could be observed? A. Bacterial cell, 2000 NM in diameter b. Ribosome, 20 NM in diameter c. Virus particle, 15 NM in diameter d. Protein molecule, 10 NM in diameter e. None of the above 8. A certain drug has knocked out all ribosomal function in a culture of liver cells, as a result: a. The cells immediately die b. Proteins synthesis stops c. TAP production immediately ceases d. The cells undergo fission e. None of these 9.

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If your thumb is 20 mm wide and a mitochondria is 2 mm wide, how many mitochondria could fit across the width of your thumb? A. 1000 b. 1 x 103 c. 100,000 d. 1 x 104 10. A mm, Go, 01 and Mol all have in common that they each represent meter, gram, liter and mole, respectively. A. 0. 001 b. 10-5 c. 10-6 d. 10-9 e. 10-12 11. A peptide (amide) bond is produced by the reaction of: a. Two carboxylic groups b. Two hydroxyl groups c. Two amino groups d. Two phosphate groups of a distinguishes these macromolecules from each other?

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