BIO 353 Exam 1 Cell Biology Practice Questions and Answers

BIO 353 Exam 1 Cell Biology Practice Questions and Answers The three tenets of the cell theory are: A) 1. Organisms except viruses consist of one or more cells; 2. The cell is the basic unit of structure for all organism except viruses; 3. All cells arise only from existing cells B) 1. All Organisms consist of one or more cells; 2. The cells is the basic unit of structure for all organisms; 3. Some cells arise from preexisting cells. C) 1. All organisms consist of one or more cells; 2. The cell is the basic unit of structure for all organism; 3. All Cells arise from preexisting cells - Ans:-C) 1. All organisms consist of one or more cells; 2. The cell is the basic unit of structure for all organism; 3. All Cells arise from preexisting cells If you want to examine a cellular structure that is less than 0.1um, what type of microscope would you choose to perform such study? ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/27 A) Light B) Electron - Ans:-B) Electron Light: An instrument with a visible light wavelength range of 400-700 nm, the limit of resolution is 200- 350 nm (.2-.35 um) Anything small than .2 um would be best to use electron microscope Which of the following is NOT a fundamental property of carbon? A) Carbon-containing molecules are stable B) Carbon atoms are most likely to form ionic bonds with one another C) Carbon has a valence of 4 ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 3/27 D) Carbon-containing molecules are diverse - Ans:-B) Carbon atoms are most likely to form ionic bonds with one another Biologically, which of the following is the least important characteristic of water? A) Water molecules are polar B) Water is a good solvent C) Water molecules form numerous hydrogen bonds with each other D) Water typically contains isotopes of hydrogen - Ans:-D) Water typically contains isotopes of hydrogen Hydrophobic interactions is the results of the attraction force of hydrophobic molecules for each other A) True B) False - Ans:-B) False The "Principle of Self Assembly" states that: The information requires to specify the folding of macromolecules and their interactions to form more complicated structures with specific biological functions (Blank 1) inherent in the polymers themselves (Blank 2) further information or energy input ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 4/27 A) (1) is; (2) but requires B) (1) is; (2) and requires no C) (1) is not; (2) but requires D. none of the above - Ans:-B) (1) is; (2) and requires no What amino acid has a disulfide bond? - Ans:-Cysteine Then secondary structure of polypeptides ( alpha helix and beta sheets) are common among proteins because they result from (blank 1) bonds between elements of the (blank 2). A) (1) hydrogen; (2) polypeptide backbone B) (1) Ionic; (2) amino acid side chains C) (1) Ionic; (2) polypeptide backbone D) None of the above - Ans:-A) (1) hydrogen; (2) polypeptide backb