BASI - Module 1 - Practice Questions and Answers with complete solution

Nucleic acids stain with ______ dyes which impart a ________ color. Therefore, nucleic acids are described as ______. A. Base-like; blue/purple; acidophilic B. Acid-like; red/pink/orange; basophilic C. Base-like; blue/purple; basophilic D. Acid-like; red/pink/orange; acidophilic - Answer-C. Base-like; blue/purple; basophilic Which molecules are lost from cells during the processing for H&E staining? a. Carbohydrates b. Proteins c. Lipids d. Nothing is lost - Answer-c. Lipids A slide-mounted cell is found to contain these prominent structures: cell membrane, smooth ER, nucleus, cytoplasm, vesicular mitochondria, and lipid inclusions. What could be its role? A) Lysosomal enzyme synthesis B) Antibody production C) Sterol synthesis D) Gastric enzyme synthesis E) Phagocytosis - Answer-C) Sterol synthesis In a cellular membrane the glycocalyx is on the ______ and is made up of ______ a. E-face; Lipids b. E-face; Carbohydrates c. P-face; Lipids d. P-face Carbohydrates - Answer-b. E-face; Carbohydrates Which of the following statements is INCORRECT?A) Disulfide bonds are very strong and important in protein folding B) The amino acids used to form disulfide bonds have uncharged polar side chains C) Disulfide bonds occur between two serine residues D) Disulfide bonds help link two separate polypeptide chains - Answer-C) Disulfide bonds occur between two serine residues A single alpha helix is an example of what level of structural protein? A) Primary B) Secondary C) Tertiary D) Quaternary - Answer-B) Secondary