9. Rough endoplasmic reticulum contains which feature? A) actin filaments b) inc

Question

9. Rough endoplasmic reticulum contains which feature? A) actin filaments b) inclusion ) golgi c) mitochondria d) lysosome bodies c) ribosomes d) lysosomes 10. Actin filaments are a component of which cellular feature? A) ribosomes b) cytoskeleton c) cell membranes d) cell walls apter 2. Water Chemistry, Buffers and Amphipathicity 11. lon-dipole forces would be seen between: a) two water molecules b) a water molecule c) a sodium ion and a chloride ion d) two hexane (nonpolar) and a sodium ion molecules 12. Van Der Waals forces would be seen between: a) two water molecules b) a water molecule and a sodium ion c) a sodium ion and a chloride ion d) two hexane (nonpolar) molecules 13. A salt bridge would be seen between: : a) two water molecules b) a water molecule c) a sodium ion and a chloride ion d) two hexane (nonpolar) and a sodium ion molecules 14. The pH of 0.001 M NaOH solution would be: a) 2 b) 3 c) 12 d) 11 15. The amphipathic substance used in our Amphipathic Home Lab exercise was: a) the oil b) the water c) the soap d) the entire mixture uffer problem

Explanation / Answer

ANSWER9:-The endoplasmic reticulum plays an important role in the biosynthesis, processing, and transport of proteins and lipids.Rough endoplasmic reticulum have ribosome which helps in protien sysnthesis.

The ribosomes on rough ER specialize in the synthesis of proteins that possess a signal sequence that directs them specifically to the ER for processing. (A number of other proteins in a cell, including those destined for the nucleus and mitochondria, are targeted for synthesis on free ribosomes, or those not attached to the ER membrane; see the article ribosome.) Proteins synthesized by the rough ER have specific final destinations. Some proteins, for example, remain within the ER, whereas others are sent to the Golgi apparatus, which lies next to the ER. Proteins secreted from the Golgi apparatus are directed to lysosomes or to the cell membrane; still others are destined for secretion to the cell exterior. Proteins targeted for transport to the Golgi apparatus are transferred from ribosomes on rough ER into the rough ER lumen, which serves as the site of protein folding, modification, and assembly.

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