32. The antimetabolites inhibit: a) the ribosome assembly b) the ribosome movement c) cell respiration d) glycolysis e) the Krebs cycle

In a lysosomal storage disease, newly synthesized lysosome hydrolases are secreted from the cells rather than being delivered to the lysosomes. From the list below, what is the most likely reason? Please EXPLAIN. a) The cis-Golgi network lacks a proton gradient b) The ER is unable to produce lysosomal vesicles c) Lysosomal enzymes are not phosphorylated in the rER d) Mannose is not phosphorylated in the cis-Goligi network e) All the hydrolase genes are mutated, resulting in synthesis by ribosomes free in the cytoplasm rather than on the endoplasmic reticulum membrane Give typing answer with explanation and conclusion

Cytopathic effects (CPE) are visible changes in cells due to: A)viral infection B)mutations C)bacterial infections D)the cell's genes are being expressed

Which of the following sequences could NOT be used as an anticodon in a cell?Question 41 options: A) 3'-CCU-5' B) 3'-AAU-5' C) 3'-GGI-5' D) 3'-GCI-5' E) 3'-UGG-5'

The commonly prescribed antibiotic Clindamycin blocks the peptide bond formation between amino acids during protein synthesis. This would happen during     A) transformation.     B) translation.     C) transcription.     D) replication.     E) mitosis.

32.     ________ are members of an integral membrane glycoprotein family that bind to specific carbohydrate arrangements in oligosaccharides that project from the surfaces of other cells. a)     Selectinsb)     Integrinsc)     Cadherinsd)     Immunoglobulin super family proteinse)     Calmodulins

29 Which kind of macromolecule is regarded as a good candidate for the original self-replicator (or genetic molecule)  because it can both cause dehydration synthesis and encode information efficiently? a) Neurotransmitter                     b) DNA               c) Hormones                       d) Proteins             e) RNA

34- What is the function of the cytoplasmic streaming in a cell? a) Cellular respiration b) Cellular communication c) Cell division d) Movement of organelles and nutrients within the cell 35- Which organelle is responsible for regulating the levels of calcium ions in a cell? a) Nucleus b) Golgi apparatus c) Endoplasmic reticulum d) Mitochondria 36- What is the function of the peroxisome in a cell? a) Synthesis of lipids b) Detoxification of harmful substances c) Protein synthesis d) Storage of genetic information ۷۵ / ۱۳ 37- Which organelle is responsible for the synthesis of RNA molecules? a) Nucleus b) Ribosome c) Golgi apparatus d) Vacuole 38- What is the function of the cytoplasmic vesicles in a cell? a) Energy production b) Transport of molecules within the cell c) Intracellular digestion d) Synthesis of proteins

15- Which organelle is known as the "powerhouse" of the cell due to its role in producing energy? a) Nucleus b) Lysosome c) Vacuole d) Mitochondria 16- What is the function of ribosomes in a cell? a) Storage of genetic information b) Synthesis of proteins c) Breakdown of waste materials. d) Synthesis of lipids 17- Which of the following is NOT a function of the nucleus in a cell? a) Storage of genetic information b) Control of cell activities c) Synthesis of proteins d) Reproduction of the cell 18- Which organelle is responsible for packaging and sorting proteins for transport within the cell or secretion outside the cell? a) Endoplasmic reticulum b) Nucleus c) Golgi apparatus d) Vacuole 19- What is the function of the cytoskeleton in a cell? a) Cellular respiration b) Cellular communication c) Cell division. d) Structural support and cell movement

What cell types would be able to grow on the ECM in the following situations? F- , Hfr , Mix   a) Streptomycin was not added to the ECM.   b) The ECM contains thiamine.   c) The ECM contains all 20 amino acids and all 5 nitrogenous nucleic acid bases