7) In DNA/RNA chains, what is the direction of synthesis?
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- Which term among A-D is not correctly matched with its definition? A) O Slime layer: loose assemblage of polysaccharide material external to the cell envelope B) O Polysome or polyribosome formation: multiple ribosomes binding to a messenger RNA transcript C) O Replisome: two of these complexes working in opposite directions are needed to copy the bacterial chromosome D) O Nucleoid: cytoplasmic area containing the bacterial chromosome E) OA-D are all correctly matchedWhich is true of ribosomes found in eukaryotic cells? They: A) contain DNA B) synthesize carbohydrates C) are attached to the Rough Endoplasmic reticulum (RER) and carry out the synthesis of proteins D) are found inside the endoplasmic reticulum E) are originally found associated with the endoplasmic reticulum in prokaryotic cells.Which of the following statements is correct ? And explain your answer A) the heridetary information of a cell is passed on by its protein B) bacterial DNA is found in the cytoplasm C) plants are composed of prokaryotic cell.
- Which is not true of Eukaryotic cells? A) A true nucleus contains DNA in the form of chromosomes B) Eukaryotic cells contain membrane-bounded compartments or organelles C) Their Dna employs a nucleoid area to produce proteins D) Thye all contain mitochondria E) They contain specialized organelles in the cytoplasm Explain why1. Describe the relationship between the following cellular structures and contents. a) endoplasmic reticulum and the nuclear envelope B) centriole and microtubules C) ribosome and nucleolus D) plastids and pigments1.Which of the following is true with a eukaryote? A) It has DNA. B) It ha s cell m embrane C) Both of the above. 2.Which of the following part is absent in a human red bl ood cell? A) nucleus C) cell membrane B) cytoplasm 3.What makes the endoplasmic reticulum rough? B) ribos ome A) mitochondria C) vesicles 4.Which of the following cell part is absent in a human spermatozoon? B) cytoplasm C) cell m embrane A) nucleus 5.What chemical substance stores energy for cellular use? C) adenosine triphosphate B) NAD PH A) glucose B Ctrl)
- The biological process shown in Figure 1 occurs in a eukaryotic cell’s nucleus. d) Name X and state how it functions in a protein synthesis. e) Give three differences between molecules X and Y.50. Cell motility involves the coordination of many events in the cell. In cells lacking flagella/cilia, which of the following are NOT required for cell motility? a) extension of actin filaments b) transmembrane proteins associating with extracellular matrix proteins in the underlying surface c) myosin-mediated contraction at the rear of the moving cell d) formation of a microtubule array in the leading edge of the cell e) formation of plasma membrane extensions such as pseudopodia or filopodiaWhich of the following proteins would NOT be made on ribosomes that are bound to the rough endoplasmic reticulum? a) a digestive protein that is found inside a lysosome b) an ion channel protein that is inserted into the cell membrane. c) insulin protein, which is secreted from the cell. d) a protein that becomes part of the cytoskeleton
- Below are the steps of protein synthesis. What is the correct sequential order? 1. MRNA is formed with codons as product of transcription. 2. Codons are translated and polypeptide chain is transferred. 3. mRNA moves into cytoplasm and becomes associated with ribosomes. 4. DNA in nucleus serves as a template. 5. Anticodon - codon complementary base pairing occurs with tRNA and MRNA. * 4, 1, 3, 2, 5 4, 3, 1, 5, 2 O 4, 1, 2, 3, 5 O 4, 1, 3, 5, 2Discuss the functions of microtubules.The process by which messenger RNA codes for the synthesis of a specific protein is called: a) replication b) transcription c) translation d) gene regulation Which statement is true about prokaryotes? A) they have no chromosomes b) they have chromosomes, but they are not membrane bound c) they have membrane bound chromosomes d) their chromosomes are made of RNA rather than DNA In a eukaryotic cell, most ATP is made in which location? A) nucleus b) mitochondria C) cytoplasm d) golgi apparatus
