Q3:3、Which of the following is correct?
A, Nucleus is an intracellular organ that regulates few cell activities
B, Ribosomes are not membrane-bound, and they are considered as organelles
C, There is only an inner series of membranes called cristae in Mitochondria
D, Lysosomes are sacs of hydrolytic enzymes and Lysomes are the principal site of intracellular digestion
Q4:4、Which of the following is not correct about Endoplasmic Reticulum?
A, Smooth ER Stores K+ ions in muscle cells to facilitate normal muscle contractions
B,Ribosomes studded in Rough ER produces protein
C, Smooth ER assists in the synthesis of sex hormone
D, Rough ER is studded with ribosomes
Q5:5, Fill in the correct answer to the blank, ______________ consist of _____ pairs of microtubules organized around 2 singlet microtubules.
正确答案
Q6:6, Why does Mitochondria constantly divide and fuse with each other in order to exchange DNA?
A, For respiration
B, For cell development
C, For Apoptosis
D, All of above
Q7:7,Which of the following is not correct in plants intracellular organ?
A, plants have cell walls made of cellulose
B, Cell wall contains primary cell wall immediately outside the plasma membrane
C, green pigment chlorophyll absorbs light energy and synthesizes glucose
D, Chloroplasts have another inner membrane system called thylakoids