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AH & O BIOLOGY > UNIT#04 CELL STRUCTURE AND FUNCTION > Flashcards

UNIT#04 CELL STRUCTURE AND FUNCTION Flashcards

(102 cards)

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1
Q

Some cellular organelles are bounded by a single membrane, while others have two membranes around them. Which of the following is correct?

A

Non-Membranous:
➡Ribosomes

➡Centrioles
➡Cytoskeleton
Single Membrane:
➡Endoplasmic Reticulum
➡Golgi Apparatus
➡Lysosomes
➡Vacuoles
➡Microbodies
Double Membrane:
➡Nucleas
➡Chloroplast
➡Plastid
➡Mitochondria

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2
Q

Cells without nucleoli die because they do not possess:

A

Ribosomes are unable to manufacture proteins

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3
Q

Free-floating ribosomes of cytoplasm in humans synthesise it:

A

DNA helicase

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4
Q

These play a vital role in the defence activity of macrophages:

A

Lysosomes

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5
Q

Damage to one of the following immediately kills the cell whether it’s prokaryotic or eukaryotic:

A

Cell Membrane

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6
Q

Which of these is not a part of murein:

A

Proteins

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7
Q

Murein is composed of:

A

Polysaccharides
Glycans

Amino acid proteins

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8
Q

Movement of Na+ across axon membrane via Na+-K+ pump is an example of:

A

Active Transport

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9
Q

Which one always passes through the nuclear membrane from the nucleoplasm to the cytoplasm?

A

RNAs

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10
Q

Cytoplasmic streaming movement causes the flow of all except:

A

Endoplasmic Reticulum

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11
Q

They help to detoxify the harmful drugs:

A

SER

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12
Q

In the Golgi apparatus, cisternae are thought to move from _____ to ____ face.

A

Convex, Concave

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13
Q

It is mismatched with reference to mitochondrial membrane:

A

Outer membrane-Chemiosmosis

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14
Q

In cross-section, each centriole consists of a cylindrical array of:

A

9 microtubule triplets

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15
Q

Cell secretions are actually produced at _____, then transported to outside through _______ and ______.

A

Ribosomes, ER, Golgi apparatus

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16
Q

Type of ribosomes present in the cytosol and organelles of the eukaryotic cell are respectively:

A

The 80S and 70S

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17
Q

Which of the following cell type would you expect to be abundant with endoplasmic reticulum and Golgi bodies?
I. Plasma B cells (produce antibodies)

II. Adipose Cells (store fats)
III. Islet of Langerhans cells (secrete insulin)
IV. Red blood cells (transport oxygen)

A

I and III Only

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18
Q

Which of the following is a protective structure in bacterial cells?

A

Cell wall

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19
Q

Plant cells are distinguishable from animal cells in containing:

A

Ribosomes

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20
Q

The endoplasmic reticulum is absent in;

A

Protists and Fungal cells

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21
Q

Which one is always unicellular?

A

Mycoplasma

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22
Q

If the size of a particle is large or it has a polarity, the suitable method of transportation will be:

A

Facilitated Diffusion

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23
Q

Nucleolus contains:

A

Nucleolus contains:

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24
Q

The transport of glucose into the cell with the help of insulin is an example of:

A

Facilitated Diffusion

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25
The functional units of the Golgi apparatus are:
Cristernae
26
Centrioles/centrosome takes part in:
Spindle Formation
27
The outer and inner membranes of mitochondria are:
Structurally and functionally different
28
Which substances can cross plasma membrane more easily?
Lipid soluble
29
Part of the cell membrane which is in contact with the external and internal environment is:
Hydrophilic
30
The ratio of RNA and protein in a ribosome is:
1:1
31
Excretory granules bud off from;
Golgi Bodies
32
What is polysome?
One mRNA and many ribosomes
33
The vesicles which diffuse to form a stack of cisternae sacs are derived from:
SER
34
Which one is a self-replicating organelle?
Mitochondrion
35
The exact replica of the chromosome is:
Chromatid
36
Which of the following organelle is involved in autophagy?
Lysosomes
37
All of the following are single membranous organelle except:
Mitochondria
38
Lysosomes are most abundant in;
Animal cells having phagocytic activity
39
The absence of an enzyme that is involved in the catabolism of lipids results in:
Tay-Sachs disease
40
The Tay-Sachs disease mostly affects the followings organ in the human body:
Brain
41
The lysosomes which eat parts of their own cells or cellular components during cellular starvation are called:
Primary lysosomes
42
All of the following enzymes can be present in peroxisomes except:
Primary Lysosomes
43
All of the following enzymes can be present n peroxisomes except:
Phosphofructokinase
44
All of the following enzymes are present in peroxisomes:
Catalase Peroxidase Glycolic acid oxidase
45
Peroxisomes are specifically involved in the formation and decomposition of:
Hydrogen-peroxide
46
The diameter of peroxisomes is approximate:
0.5 micrometre
47
The conversion of lipids to carbohydrates is the function of:
Glyoxysomes
48
Glyocysosmes are primarily found n:
Germinating seedlings
49
The size and number of mitochondria in a cell depend upon which factor?
Physiological activities
50
Glyoxysomes are absent in which of the following seed type?
Pea
51
The type of cytoskeletal proteins that play important role in the assembly and disassembly of the spindle during mitosis:
Microtubules
52
Which of the following can maintain the shape of the cell?
Intermediate Filament
53
Semiautonomis organelle is:
Chloroplast
54
Which of the following organelle is not present in plant cells?
Flagella
55
Which o the following best describes the function of the rough endoplasmic reticulum in eukaryotic cells?
Synthesis of proteins
56
Which of the following eukaryotic organelle has a symbiotic origin with bacteria?
Chloroplast
57
Which of the following statement is true?
Prokaryotic cells came before eukaryotic cells
58
Which of the following organelle lack ribosomes?
Golgi apparatus
59
Which of the following membrane has the largest number of proteins?
Inner mitochondrial membrane
60
In the plasma membrane, carbohydrates combine with the lipids and proteins to form glycolipids and glycoproteins and are oriented:
Towards outside
61
Which of the following organelle have a continuous connection with the nuclear membrane?
RER
62
The transport of secretory proteins takes place through organelles in order:
RER➡SER➡Golgi apparatus➡Secretory vesicles
63
Protein glycosylation occurs in;
The lumen of rough endoplasmic reticulum
64
Which of the following structure involved in oxidative phosphorylation?
Inner Mitochondrial Membrane
65
Identify non-membranous organelle from the following:
Ribosomes
66
The hydrophobic portion of plasma membrane present in/at:
Towards extracellular matrix
67
Which of the following describe the fluid membrane model of plasma membrane structure?
Phospholipid bilayer with embedded proteins
68
The nucleolus is visible in:
Interphase
69
The 40S (Eukaryote) is a small ribosomal unit of:
Yeast (as it is eukaryote)
70
Which of the following cell organelle can be viewed with the help of high power light microscope?
Mitochondria
71
All of the following proteins are present in microfilament except:
Tubulin➡Microtubules
72
All of the following proteins are present in microfilament:
Myosin Actin Tropomyosin
73
Which of the following is not present in a plant cell?
Lysosomes
74
What is the main difference between prokaryotes and eukaryotes?
Prokaryotes do not have internal membranes
75
Prokaryotic and eukaryotic cells generally have one o the following feature in common?
Ribosomes
76
Which of the following statement is incorrect regarding the endoplasmic reticulum
RER is more than SER in adipose tissue
77
All of the following contain DNA except:
Ribosome
78
Which of the following is not a characteristic of the animal cell membrane?
Synthesis of ATP
79
With respect to their surrounding membrane systems, which is the odd one out?
Endoplasmic Reticulum
80
Which o the following protein is present in the microtubule?
Tubulin
81
Golgi complex is involved in the formation of _________.
Lysosome
82
Which function is performed by both types of ER?
Mechanical support
83
The free-floating organelles are:
Chloroplast
84
A distinguished feature of a prokaryotic cell is its:
Cell wall
85
The Krebs cycle occurs in ____ of mitochondria.
Matrix
86
Which acts as a receptor site on the plasma membrane?
Glycoprotein
87
Which of the following cell type is more appropriate to study mitochondria?
Muscle Cell
88
Which of the following cell type do not have mitochondria:
RBC (generate energy through glycolysis)
89
Which is the correct pair?
Modification➡Golgi apparatus
90
Which structure is more important for cell life?
Cell membrane
91
Which of the following organelle is responsible for the production of steroid hormones?
Smooth endoplasmic Reticulum
92
Which of the following organelle is responsible for the production of protein synthesis?
Rough Endoplasmic Reticulum
93
The number of centrioles in a cell after completion of the G2 phase and during metaphase of mitosis is ____ and ___ respectively.
2 and 4
94
All of the following are common molecules in the membrane of all types of cells except:
Cholesterol
95
A function that is not related to smooth endoplasmic reticulum:
Enzyme synthesis
96
Which of the following function is not performed by the cell membrane of a plant cell?
Phagocytosis
97
Organelles involved in organic molecule synthesis and organic molecule breakdown respectively:
Chloroplast and mitochondria
98
Which organelle in the eukaryotic cell functionally resembles mesosomes of the prokaryotic cell?
Mitochondria
99
Which type of molecule will make channels for the movement of neutral substances down concentration gradients?
Protein
100
Under which o the following conditions, would you expect to find a cell with a predominance of free ribosomes?
a cell producing cytoplasmic enzymes
101
Which of the following possesses a microtubular structure similar to a basal body?
Centriole
102
Mitochondria have enzymes for all of these processes except:
Fermentation

AH & O BIOLOGY (13 decks)

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