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Cell Structure And Functions

Cell Structure And Functions - Biology Questions asked by Filo students

Question 1

Target : Pre-Medical 2020/02-12.2018 132. A short length of DNA contains 80 thymine and 80 guanine bases, then how many total N-bases will be present in this DNA?

Topic:

Cell: Structure and Functions

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Question 2

What will be the total number of mitotic divisions in the formation of 64 daughter cells?

Topic:

Cell: Structure and Functions

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Question 3

Small bristle-like structures that sprout out of bacterial cell a. Are flagella b. Are made of special protein c. Help bacteria to attach to the rocks in streams Mark the correct one. OPTIONS MARK FOR REVIEW CLEAR SELECTION

$a$ and $b$
b and c
$a$ and $c$
All $a, b$ and $c$

Topic:

Cell: Structure and Functions

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Question 4

Select the true statement for centrioles. OPTIONS MARK FOR REVIEW CLEAR SELECTION

Nine radial spokes are found
There are eighteen peripheral doublets
Central hub contains a pair of microtubules
Central sheath surrounds the central doublet

Topic:

Cell: Structure and Functions

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Question 5

In telocentric chromosome OPTIONS MARK FOR REVIEW CLEAR SELECTION

Telomeres are absent
There is one short arm and one long arm
Centromere is not seen
Centromere is situated at its tip

Topic:

Cell: Structure and Functions

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Question 6

In telocentric chromosome OPTIONS MARK FOR REVIEW CLEAR SELECTION

Telomeres are absent
There is one short arm and one long arm
Centromere is not seen
Centromere is situated at its tip

Topic:

Cell: Structure and Functions

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Question 7

Which one is not a double membrane bound structure of cell? OPTIONS MARK FOR REVIEW CLEAR SELECTION

Plastid
Mitochondria
Nucleus
Endoplasmic reticulum

Topic:

Cell: Structure and Functions

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Question 8

Growth and reproduction are mutually exclusive events for all, except OPTIONS MARK FOR REVIEW CLEAR SELECTION

Higher animals
Unicellular algae
Filamentous algae
Hydra

Topic:

Cell: Structure and Functions

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Question 9

What would be the number of chromatids in metaphase stage of mitosis? If an organism contain eight chromosomes in its viable gametes?

Topic:

Cell: Structure and Functions

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Question 10

When it comes to human beings, it is all the more difficult to define the living state. We observe patients lying in coma in hospitals virtually supported by machines which replace heart and lungs. The patient is otherwise brain-dead. The patient has no self-consciousness. Are such patients who never come back to normal life, living or non-living? In higher classes, you will come to know that all living phenomena are due to underlying interactions. Properties of tissues are not present in the constituent cells but arise as a result of interactions among the constituent cells. Similarly, properties of cellular organelles are not present

Topic:

Cell: Structure and Functions

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Question 11

Catharanthus roseus is a medicinal herb that produces a diverse array of secondary metabolites like which is used in chemotherapy to treat cancer.

Topic:

Cell: Structure and Functions

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Question 12

8.2.2 Acquired Immunity Acquired immunity, on the other hand is pathogen specific. It is characterised by memory. This means when our body encounters a pathogen for the first time it produces a response called primary response which is of low intensity. Subsequent encounter with the same pathogen elicits a highly intensified secondary or anamnestic response. This is ascribed to the fact that our body appears to have memory of the first encounter. The primary and secondary immune responses are carried out with the help of two special types of lymphocytes present in our blood, i.e., B-lymphocytes and

Topic:

Cell: Structure and Functions

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Question 13

Total number of ATP required for the synthesis of one plucose molecule in Sorghum plant, is

$12 ATP$
$18 ATP$
$24 ATP$
$30 ATP$

Topic:

Cell: Structure and Functions

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Question 14

+ 4, 0, - 1, 0

□

Review Total number of ATP required for the synthesis of one glucose molecule in Sorghum plant, is

12 ATP
$18 ATP$
24 ATP
30 ATP

Topic:

Cell: Structure and Functions

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Question 15

+ 4, 0, - 1, 0

□

Review Total number of ATP required for the synthesis of one glucose molecule in Sorghum plant, is

$12 ATP$
18 ATP
$24 ATP$
$30 ATP$
$A$

Topic:

Cell: Structure and Functions

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Question 16

Select the secondary metabolites from the list given below. 1. Alkaloids II. Flavonoids III. Rubber IV. Essential oils V. Antibiotics VI. Coloured pigments VII. Scents VIII. Gums IX. Spices Choose the correct option.

I to IX
All except II and IX
I, III, IV and VI
All except I and VI

Topic:

Cell: Structure and Functions

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Question 17

I to IX
All except II and IX
I, III, IV and VI
All except I and V)

Topic:

Cell: Structure and Functions

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Question 18

Identify the correct pairing among the following : Name of enzyme Microbial source

Invertase Sclerotinia libertine
Pectinase Candida lipolytica
Lipase Saccharomyces cerevisiae
Cellulase

Topic:

Cell: Structure and Functions

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Question 19

10.2.5 Cytokinesis Mitosis accomplishes not only the segregation of duplicated chromosomes into daughter nuclei (karyokinesis), but the cell itself is divided into two daughter cells by the separation of cytoplasm called cytokinesis at the end of which cell division gets completed (Figure

10.2

e). In an animal cell, this is achieved by the appearance of a furrow in the plasma membrane. The furrow gradually deepens and ultimately joins in the centre dividing the cell cytoplasm into two. Plant cells however, are enclosed by a relatively inextensible cell wall, thererfore they undergo cytokinesis by a different mechanism. In plant cells, wall formation starts in the centre of the cell and grows outward to meet the existing lateral walls. The formation of the new cell wall begins with the formation of a simple precursor, called the cell-plate tnat represents the middle lamella between the walls of two adjacent cells. At the time of cytoplasmic division, organelles like mitochondria and plastids get distributed between the two daughter cells. In some organisms karyokinesis is not followed by cytokinesis as a result of which multinucleate condition arises leading to the formation of syncytium (e.g." liquid endosperm in coconut).

Topic:

Cell: Structure and Functions

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Question 20

Identify the option which is correct regarding the cell organelles which are also found within other cell organelles.

These are single membrane bound structures
They are composed of ribonucleic acid and proteins
They store proteins and lipids
These are formed only in the nucleus

Topic:

Cell: Structure and Functions

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Cell Structure And Functions - Biology Questions asked by Filo students

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