CELL STRUCTURE AND CYTOSKELETON Flashcards
- Which among the following is incorrect about lysosomes?
a) These are membrane-bound vesicles that contain digestive enzymes
b) They are double membraned and are isolated from their neighboring environment
c) The digestive enzymes present include proteases, lipases, nucleases, glycosidases and phosphatases
d) The lysosomes defend against bacterial and viral infection
b) They are double membraned and are isolated from their neighboring environment
- Which among the following is incorrect about lysosomes?
a) These are membrane bound vesicles that contain digestive enzymes
b) They are double membraned and are isolated from their neighboring environment
c) The digestive enzymes present include proteases, lipases, nucleases, glycosidases and phosphatases
d) The lysosomes defend against bacterial and viral infection
b) They are double membraned and are isolated from their neighboring environment
. Which among the following statements is incorrect about mitochondria?
a) Mitochondria is a rod-shaped organelle bounded by two membranes and is also called as the power house of the cell
b) Mitochondria has an outer membrane, an inner membrane, cristae and matrix
c) The inner membrane of the mitochondria is highly folded and these folds provide greater surface area for the generation of ATP molecules
d) Mitochondria can’t synthesize their own proteins and depend on rough endoplasmic reticulum
d) Mitochondria can’t synthesize their own proteins and depend on rough endoplasmic reticulum
. Which among the following statements is incorrect about mitochondria?
a) Mitochondria is a rod-shaped organelle bounded by two membranes and is also called as the power house of the cell
b) Mitochondria has an outer membrane, an inner membrane, cristae and matrix
c) The inner membrane of the mitochondria is highly folded and these folds provide greater surface area for the generation of ATP molecules
d) Mitochondria can’t synthesize their own proteins and depend on rough endoplasmic reticulum
d) Mitochondria can’t synthesize their own proteins and depend on rough endoplasmic reticulum
Which of the following is known as the suicide bag of a cell?
a) Mitochondria
b) Golgi Complex
c) Lysosome
d) Nuclei
c) Lysosome
. Which among the following is incorrect about cytoskeleton, cilia, and flagella?
a) Cytoskeleton is the network of minute proteinaceous structures in the cytoplasm and which mainly contains microfilaments and microtubules
b) Microtubules are composed of protein actin and microtubules are composed of the protein tubulin
c) Cilia are present in large numbers of the body and only one or two flagella are present in an organism
d) Both flagella and cilia help in the movement of the organism
b) Microtubules are composed of protein actin and microtubules are composed of protein tubulin
Which among the following is not correct about the Golgi apparatus?
a) They are absent in RBCs, sperm cells of Pteridophytes and Bryophytes
b) Golgi apparatus is freely distributed in animal cells and in plants fluid filled sac like structures called cisternae that pile parallel to each other to form Golgi bodies
c) There are three main components, namely, cisternae, tubules, and vesicles
d) The membrane-bound containers that appear dense in the cytoplasm are called vesicles
b) Golgi apparatus is freely distributed in animal cells and in plants fluid filled sac like structures called cisternae that pile parallel to each other to form Golgi bodies
- Lysosomes are produced by which of the following cell organelles?
a) Mitochondria
b) Endoplasmic Reticulum
c) Golgi Complex
d) DNA
) Golgi Complex
- Which structure of the cytoskeleton is found in animals but not in plant?
Centrioles
, which feature of the nucleus is not clearly shown by the visual analogy
The chromatin is not shown
The cells that produce hair synthesize high levels of keratin protein and contain a lot of ________, while the cells that produce the oils that coat the hair contain a lot of ________.
rough endoplasmic reticulum . . . smooth endoplasmic reticulum
The quaternary structure of a protein is determined by
[a] Interactions between distant amino acids of the same polypeptide
[b] Interactions between close amino acids of the same polypeptide
[c] Interactions between amino acids of different polypeptide chains
[d] The arrangement of the alpha helices and beta sheets in the protein[e] Binding of a coenzyme or cofactor to the protein
c
what is the role of endosome(1) and peroxisome(2)
- responsible for sorting endocytosed material.
2. responsible for oxidizing toxic molecules.
. When colchicine is added to a cell, the following will occur:
a. Microtubules will grow at a faster rate.
b. Microtubules will shrink at a faster rate.
c. Movement of membrane-enclosed organelles will be impaired.
d. More free tubulin will be available in the cell.
e. Free tubulin in the cell will be unchanged.
c
Which of the following is NOT true about intemediate filaments?
a. Cytoplasmic intermediate filaments form sheet-like structures. b. Nuclear intermediate filaments form a two-dimensional mesh structure.
c. Intermediate filaments consist of protein subunits that have N-terminal globular tails C-terminal
globular heads.
d. Intermediate filaments of the nuclear lamina disassemble and reform each cell division
membrane and are part of the Endomembrane System?
c
