41) The assisted transport of a molecule across the cell membrane without an exp

Question

41) The assisted transport of a molecule across the cell membrane without an expenditure of energy is known as what? A) diffusion B) facilitated transport C) active transport D) osmosis E) crenation 42) If a cell lacked ribosomes, it would not be able to A) form a spindle apparatus. B) synthesize proteins. C) respire oxidatively D) break down fats. E) produce ATP 43) What do the SER and RER have in common? A) the presence of ribosomes B) the formation of transport vesicles C) the synthesis of phospholipids D) the synthesis of proteins E) the processing and modification of proteins 44) Which of the following would be a way of finishing this hypothesis about the function of the Golgi apparatus? If the Golgi apparatus is involved in packaging products for secretion, then A) vesicles must travel from the Golgi to the cell surface B) vesicles must travel from the RER and SER to the Golgi apparatus. C) the Golgi apparatus must be part of the endomembrane system. D) the Golgi apparatus must consist of 3 to 20 slightly curved sacs. E) the Golgi apparatus would contain proteins.

Explanation / Answer

41.B

Facilitated diffusion is transport of polar molecules such as glucose through membrane transport transporters without energy expenditure.Ex-GLUT transporters for glucose transport.

42.B

Ribosomes are the protein factories of cells.They make the proteins from mRNA by a process called translation.

43.B

SER and RER are type of endoplasmic reticulum which perform various functions inside cell including synthesis of lipids and proteins respectively,and their transport to cell surface/golgi apparatus.Transport vesicles arise from ER and make this transport possible.

44.B

All statements are correct wrt to golgi apparatus but to end the hypothesis in given sentence,option B will be most suitable ending.For packaging,it is very important for synthesized molecules(proteins and lipids)to transport to golgi body for packaging.

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