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

UNIT#04 CELL STRUCTURE AND FUNCTION Flashcards

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
Q

The functional units of the Golgi apparatus are:

A

Cristernae

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26
Q

Centrioles/centrosome takes part in:

A

Spindle Formation

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27
Q

The outer and inner membranes of mitochondria are:

A

Structurally and functionally different

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28
Q

Which substances can cross plasma membrane more easily?

A

Lipid soluble

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29
Q

Part of the cell membrane which is in contact with the external and internal environment is:

A

Hydrophilic

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30
Q

The ratio of RNA and protein in a ribosome is:

A

1:1

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31
Q

Excretory granules bud off from;

A

Golgi Bodies

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32
Q

What is polysome?

A

One mRNA and many ribosomes

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33
Q

The vesicles which diffuse to form a stack of cisternae sacs are derived from:

A

SER

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34
Q

Which one is a self-replicating organelle?

A

Mitochondrion

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35
Q

The exact replica of the chromosome is:

A

Chromatid

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36
Q

Which of the following organelle is involved in autophagy?

A

Lysosomes

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37
Q

All of the following are single membranous organelle except:

A

Mitochondria

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38
Q

Lysosomes are most abundant in;

A

Animal cells having phagocytic activity

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39
Q

The absence of an enzyme that is involved in the catabolism of lipids results in:

A

Tay-Sachs disease

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40
Q

The Tay-Sachs disease mostly affects the followings organ in the human body:

A

Brain

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41
Q

The lysosomes which eat parts of their own cells or cellular components during cellular starvation are called:

A

Primary lysosomes

42
Q

All of the following enzymes can be present in peroxisomes except:

A

Primary Lysosomes

43
Q

All of the following enzymes can be present n peroxisomes except:

A

Phosphofructokinase

44
Q

All of the following enzymes are present in peroxisomes:

A

Catalase
Peroxidase

Glycolic acid oxidase

45
Q

Peroxisomes are specifically involved in the formation and decomposition of:

A

Hydrogen-peroxide

46
Q

The diameter of peroxisomes is approximate:

A

0.5 micrometre

47
Q

The conversion of lipids to carbohydrates is the function of:

A

Glyoxysomes

48
Q

Glyocysosmes are primarily found n:

A

Germinating seedlings

49
Q

The size and number of mitochondria in a cell depend upon which factor?

A

Physiological activities

50
Q

Glyoxysomes are absent in which of the following seed type?

51
Q

The type of cytoskeletal proteins that play important role in the assembly and disassembly of the spindle during mitosis:

A

Microtubules

52
Q

Which of the following can maintain the shape of the cell?

A

Intermediate Filament

53
Q

Semiautonomis organelle is:

A

Chloroplast

54
Q

Which of the following organelle is not present in plant cells?

55
Q

Which o the following best describes the function of the rough endoplasmic reticulum in eukaryotic cells?

A

Synthesis of proteins

56
Q

Which of the following eukaryotic organelle has a symbiotic origin with bacteria?

A

Chloroplast

57
Q

Which of the following statement is true?

A

Prokaryotic cells came before eukaryotic cells

58
Q

Which of the following organelle lack ribosomes?

A

Golgi apparatus

59
Q

Which of the following membrane has the largest number of proteins?

A

Inner mitochondrial membrane

60
Q

In the plasma membrane, carbohydrates combine with the lipids and proteins to form glycolipids and glycoproteins and are oriented:

A

Towards outside

61
Q

Which of the following organelle have a continuous connection with the nuclear membrane?

62
Q

The transport of secretory proteins takes place through organelles in order:

A

RER➡SER➡Golgi apparatus➡Secretory vesicles

63
Q

Protein glycosylation occurs in;

A

The lumen of rough endoplasmic reticulum

64
Q

Which of the following structure involved in oxidative phosphorylation?

A

Inner Mitochondrial Membrane

65
Q

Identify non-membranous organelle from the following:

66
Q

The hydrophobic portion of plasma membrane present in/at:

A

Towards extracellular matrix

67
Q

Which of the following describe the fluid membrane model of plasma membrane structure?

A

Phospholipid bilayer with embedded proteins

68
Q

The nucleolus is visible in:

A

Interphase

69
Q

The 40S (Eukaryote) is a small ribosomal unit of:

A

Yeast
(as it is eukaryote)

70
Q

Which of the following cell organelle can be viewed with the help of high power light microscope?

A

Mitochondria

71
Q

All of the following proteins are present in microfilament except:

A

Tubulin➡Microtubules

72
Q

All of the following proteins are present in microfilament:

A

Myosin
Actin

Tropomyosin

73
Q

Which of the following is not present in a plant cell?

74
Q

What is the main difference between prokaryotes and eukaryotes?

A

Prokaryotes do not have internal membranes

75
Q

Prokaryotic and eukaryotic cells generally have one o the following feature in common?

76
Q

Which of the following statement is incorrect regarding the endoplasmic reticulum

A

RER is more than SER in adipose tissue

77
Q

All of the following contain DNA except:

78
Q

Which of the following is not a characteristic of the animal cell membrane?

A

Synthesis of ATP

79
Q

With respect to their surrounding membrane systems, which is the odd one out?

A

Endoplasmic Reticulum

80
Q

Which o the following protein is present in the microtubule?

81
Q

Golgi complex is involved in the formation of _________.

82
Q

Which function is performed by both types of ER?

A

Mechanical support

83
Q

The free-floating organelles are:

A

Chloroplast

84
Q

A distinguished feature of a prokaryotic cell is its:

85
Q

The Krebs cycle occurs in ____ of mitochondria.

86
Q

Which acts as a receptor site on the plasma membrane?

A

Glycoprotein

87
Q

Which of the following cell type is more appropriate to study mitochondria?

A

Muscle Cell

88
Q

Which of the following cell type do not have mitochondria:

A

RBC
(generate energy through glycolysis)

89
Q

Which is the correct pair?

A

Modification➡Golgi apparatus

90
Q

Which structure is more important for cell life?

A

Cell membrane

91
Q

Which of the following organelle is responsible for the production of steroid hormones?

A

Smooth endoplasmic Reticulum

92
Q

Which of the following organelle is responsible for the production of protein synthesis?

A

Rough Endoplasmic Reticulum

93
Q

The number of centrioles in a cell after completion of the G2 phase and during metaphase of mitosis is ____ and ___ respectively.

94
Q

All of the following are common molecules in the membrane of all types of cells except:

A

Cholesterol

95
Q

A function that is not related to smooth endoplasmic reticulum:

A

Enzyme synthesis

96
Q

Which of the following function is not performed by the cell membrane of a plant cell?

A

Phagocytosis

97
Q

Organelles involved in organic molecule synthesis and organic molecule breakdown respectively:

A

Chloroplast and mitochondria

98
Q

Which organelle in the eukaryotic cell functionally resembles mesosomes of the prokaryotic cell?

A

Mitochondria

99
Q

Which type of molecule will make channels for the movement of neutral substances down concentration gradients?

100
Q

Under which o the following conditions, would you expect to find a cell with a predominance of free ribosomes?

A

a cell producing cytoplasmic enzymes

101
Q

Which of the following possesses a microtubular structure similar to a basal body?

102
Q

Mitochondria have enzymes for all of these processes except:

A

Fermentation

AH & O BIOLOGY (13 decks)

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