Many large structures, such as viruses and ribosomes, are built from a mixture of one or more types of protein plus RNA or DNA molecules.
Many large structures, such as viruses and ribosomes, are built from a mixture of one or more types of protein plus RNA or DNA molecules.
Which of the following statements is false? A: Viruses contain DNA or RN B: The nucleic acid of a virus is surrounded by a protein coat. C: Viruses multiply inside living cells using viral mRNA, tRNA, and ribosomes. D: Viruses cause the synthesis of specialized infectious elements.
Which of the following statements is false? A: Viruses contain DNA or RN B: The nucleic acid of a virus is surrounded by a protein coat. C: Viruses multiply inside living cells using viral mRNA, tRNA, and ribosomes. D: Viruses cause the synthesis of specialized infectious elements.
What is the function of the nuclear lamina? () A: It serves as an attachment site for nuclear pore to help transport materials B: It is a point of attachment for the enzymes that synthesize histone C: It provides mechanical support for the nuclear envelope D: It binds to ribosomes that are conducting protein synthesis
What is the function of the nuclear lamina? () A: It serves as an attachment site for nuclear pore to help transport materials B: It is a point of attachment for the enzymes that synthesize histone C: It provides mechanical support for the nuclear envelope D: It binds to ribosomes that are conducting protein synthesis
Bacterial ribosomes contain about 65% rRNA and 35% protein; they have a diameter of about 18 nm and are composed of two unequal subunits of ___________ and a combined sedimentation coefficient of 70S. A: 20S and 50S B: 30S and 40S C: 30S and 50S D: 30S and 60S
Bacterial ribosomes contain about 65% rRNA and 35% protein; they have a diameter of about 18 nm and are composed of two unequal subunits of ___________ and a combined sedimentation coefficient of 70S. A: 20S and 50S B: 30S and 40S C: 30S and 50S D: 30S and 60S
Which of the following is incorrect regarding serous gonadal vesicles: A: The top of the cytoplasm contains eosinophilic secretory granules B: The basal cytoplasm is strongly basophilic C: The nucleus is oblate at the base of the cell D: At the base of the cell are a large number of parallel thick endoplasmic reticulum and mitochondria E: More ribosomes
Which of the following is incorrect regarding serous gonadal vesicles: A: The top of the cytoplasm contains eosinophilic secretory granules B: The basal cytoplasm is strongly basophilic C: The nucleus is oblate at the base of the cell D: At the base of the cell are a large number of parallel thick endoplasmic reticulum and mitochondria E: More ribosomes
Which of the following methods is not used by cells to regulate the amount of a protein in the cell A: Genes can be transcribed into mRNA with different efficiencies. B: Many ribosomes can bind to a single mRNA molecule. C: Proteins can be tagged with ubiquitin, marking them for degradation. D: Nuclear pore complexes can regulate the speed at which newly synthesized proteins are exported from the nucleus into the cytoplasm.
Which of the following methods is not used by cells to regulate the amount of a protein in the cell A: Genes can be transcribed into mRNA with different efficiencies. B: Many ribosomes can bind to a single mRNA molecule. C: Proteins can be tagged with ubiquitin, marking them for degradation. D: Nuclear pore complexes can regulate the speed at which newly synthesized proteins are exported from the nucleus into the cytoplasm.