membranous roadways with ribosomes attached on them | Choose | membranous roadways with no ribosomes attached on it | Choose sac-like. helps in packaging and transporting of protein | Choose ] gives support and shape to the cell | Choose ) makes ribosomes | Choose | DNA found here |Choose > > > > >
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- please choose correct letter and explain a bit 1. The strongest way by which a protein can maintain its shape is by using:a) ionic bonds b) disulfide bonds c) star war forces d) van der Waals forces 2. If a cell (like an amoeba) would be capable of migrating from one place to another only with movement created from the inside of the cell, then we can say that that movement is done mainly by: a) glycoproteins b) feet c) microtubules d) actin filaments True or False: In eukaryotic cells (such as human cells), the variety and diversity of proteins is much less than the variety and diversity of lipids.In the early days of ribosome research, before the exact role of ribosomes was clear, a researcher made the following observation. She could find, in sedimentation experiments on bacterial lysates, not only 3OS, 50S, and 70S particles, but also some particles that sedimented at about 100S and 130S. When she treated such a mixture with EDTA, everything dissociated to 30S and 50S particles. Upon adding divalent ions, she could regain 70S particles, but never 100S or 130S particles. (a) Suggest what the 10oS and 130S particles might represent, in light of cur- rent knowledge of protein synthesis. What important discovery did the researcher miss? (b) Why do you think reassociation to 100S and 130S particles did not work?Which of the following statements about ribosomes is true? Eukaryotic ribosomes have a P site, prokaryotic ribosomes do not have a site O Eukaryotic ribosomes consist of proteins and rRNA, prokaryotic ribosomes do not have RNA Eukaryotic ribosomes have a large subunit and a small subunit, while prokaryotic ribosomes have just one subunit Prokaryotic cells don't have ribosomes Eukaryotic ribosomes are larger than prokaryotic ribosomes
- which of the following best describes the structure of the ribosome: O made of protein only O prokaryotic and eukaryotic ribosomes are made of different sets of proteins contains DNA eukaryotic ribosomes are smaller than porkaryotic ones O made of identical RNA molecules in both eukaryotic and prokaryotic cellsWhich of the following statements about ribosomes is always true? all prokaryotic ribosomes are composed of both 40s and 60s ribosomal subunits all eukaryotic ribosomes are composed of both 30s and 50s ribosomal subunits all prokaryotic ribosomes are composed of both 30s and 50s ribosomal subunits all eukaryotic ribosomes are composed of both 40s and 60s ribosomal subunits all of the above statements are always trueRibosomes can be found on or in which of following: [Select any/all that apply.] smooth endoplasmic reticulum rough endoplasmic reticulum lysosomes nucleolus prokaryotic cells mitochondria peroxisome cytosol
- A typical human hepatocyte (liver cell), a widely studied eukaryotic cell, has a diameter of about 20 μm. Calculate the volume of both a prokaryotic and a eukaryotic cell. To appreciate the magnitude of the size difference between the two cell types, estimate how many bacterial cells would fit inside the liver cell. (Hint: Use the expression V = πr 2h for the volume of a cylinder and V = (4/3)π r 3 .TRANSLATION (RNA to _) take place on the DNA, Ribosome, cytoplasm DNA, nucleus, cytoplasm Proteins, Nucleus, ribosome Proteins, ribosomes, cytoplasm and in the2_53392678751... material, separate from the DNA in the nucleus, and can make copies * .of themselves the lysosomes and peroxisomes. the endoplasmic reticulum. the mitochondria. the ribosomes. نقطة واحدة * :The range of the blood pH is 7.0 to 7.50 7.30 to 7.40 7.40 to 7.53 7.35 to 7.45 نقطة واحدة The . . are the rarest form of white blood cells and are involved in >
- A peripheral protein, which is not integral to the cell membrane, is also called: a multi-pass transmembrane protein (like band 3.0 protein) a single-pass transmembrane protein (like glycophorin A) a monolayer-associated protein (like the COX-1 protein) a protein-attached protein (like cytochrome c) a lipid-linked protein (like the Ras protein)Each ribosome is specific for a particular type of protein where the ribosomes of the cytolasm are responsible for the synthesis of proteins that stay in the cell while ribosmes of the ER synthesize secretory proteins. Select one: True FalseConsider two different proteins that are leaving from the Golgi in order to arrive in their common destination, a lysosome. In order for these two different proteins to be sent to the same place, what should they have in common? A) They must have the same primary structure B) They must have been imported into the cell by endocytosis. C) They must have the same tertiary structure D) They probably have the same glycosylation pattern. ..