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Cell: Structure and Functions

(A) They are associated with the plasma membrane of cell in pr

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(A) They are associated with the plasma membrane of cell in prokaryotes. (B) They translate the mRNA into proteins. Above given statements are true for

Elaborate network of filamentous proteinaceous structures
Granular structures composed of RNA and proteins
Hair like outgrowths of cell membrane
Membrane bound minute vesicles called chromatophores.

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Practice more questions on Cell: Structure and Functions

Question 1

Medium

Select the option which is not correct with respect to enzyme action -

Substrate binds with enzyme at its active site
Addition of lot of succinate does not reverse the inhibition of succinic dehydrogenase by malonate
A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate
Malonate is a competitive inhibitor of succinic dehydrogenase

Topic:

Biomolecules

Book:

Biology-for-NEET-Volume-1-Class-XI

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Question 2

Easy

A diploid living organism develops from zygote undergoes which type of repeated cell division?

(a) Meiosis
(b) Amitosis
(c) Mitosis
(d) Segmentation

Topic:

Cell Cycle and Cell Division

Book:

Modern ABC Biology Class 11 Part 1 (Modern ABC)

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Question 3

Easy

Which branch study about remains of plant life?

Palaentology
Palaeobotany
Eugenics
Palynology

Topic:

The Living World

Book:

Precalculus

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Question 4

Medium

Select the correct order of reactions in glycolysis.
I. Conversion of 3-phosphoglyceraldehyde to 1, 3-bisphosphoglycerate
II. Conversion of 3-phosphoglyceric acid to 2-phosphoglycerate
III. Conversion of BPGA to 3-phosphoglyceric acid
IV. Splitting of fructose 1,6-bisphosphate into dihydroxyacetone phosphate and 3-phosphoglyceraldehyde
Codes

IV, III, I, II
II, III, I, IV
II, IV, I, III
IV, I, III, II

Topic:

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Book:

CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

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Students who ask this question also asked

Question 1

8.52

filo (ㄷ) VOÔ

42%

Cell. Cycle and Cell Drvision 10.1.1 Phases of Cell Cycle A typical eukaryotic cell cycle is illustrated by human cells in culture. These cells divide once in approximately every 24 hours (Figure

10.1

). However, this duration of cell cycle can vary from organism to organism and also from cell type to cell type. Yeast for example, can progress through the cell cycle in only about 90 minutes. The cell cycle is divided into two basic phases: - Interphase - M Phase (Mitosis phase) The M Phase represents the phase when the actual cell division or mitosis occurs and the interphase represents the phase between two successive

M

phases. It is significant to note Figure

10.1

A diagrammat that in the 24 hour average duration of cell indicating for cycle of a human cell, cell division proper lasts for only about an hour. The interphase lasts more than

95%

of the duration of cell cycle. The M Phase starts with the nuclear division, corresponding to the separation of daughter chromosomes (karyokinesis) and usually ends with division of cytoplasm (cytokinesis). The interphase, though called the resting phase, is the time during which the cell is preparing for division by undergoing both cell growth and DNA replication in an orderly manner. The interphase is divided into three further phases: -

G_{1}

phase (Gap 1) - S phase (Synthesis) -

G_{2}

phase (Gap 2)

G_{1}

phase corresponds to the interval between mitosis and initiation of DNA replication. During

G_{1}

phase the cell is metabolically active and continuously grows but does not replicate its DNA. S or synthesis phase marks the period during which DNA synthesis or replication takes place. During this time the amount of DNA per cell doubles. If the initial amount of DNA is denoted as

2 C

then it increases to

4 C

. However, there is no increase in the chromosome number; if the cell had diploid or

2 n

number of chromosomes at

G_{1}

, even after

S

phase the number of chromosomes remains the same, i.e.,

2 n

. In animal cells, during the

S

phase, DNA replication begins in the nucleus, and the centriole duplicates in the cytoplasm. During the

G_{2}

Topic:

Cell: Structure and Functions

View solution

Question 2

In Ribosome 'S' (Svedberg unit) which indirectly measure of :

density and size
shape
motility
sedimentation cofficient

Topic:

Cell: Structure and Functions

View solution

Question 3

Read the following statements and choose the correct option A. Spindle fibres are attached to the kinetochore of the chromosomes during metaphase. B. At the end of prophase cells do not show golgi complex, endoplasmic reticulum, nucleolus and the nuclear envelope. C. At anaphase centromere splits but chromatids do not separate.

$A, B & C$
Only B
Only A
Only A \& B

Topic:

Cell: Structure and Functions

View 2 solutions

Question 4

outside the cell. Materials to be packaged in the form of vesicles from the ER fuse with the cis face of the golgi apparatus and move towards the maturing face. This explains, why the golgi apparatus remains in close assoclation with the endoplasmic reticulum. A number of proteins synthesised by ribosomes on the endoplasmic reticulum are modified In the cisternae of the golgl apparatus before they are released from its trans face. Golgi apparatus is the important site of formation of glycoproteins and glycolipids. ¿ipo perobeins Type of

cosC

, that 8.5.3.3 Lysosomes - Felks the wacrowhages ganisms These are membrane bound vesicular structures formed by the process of packaging in the golgi apparatus. The isolated lysosomal vesicles

Topic:

Cell: Structure and Functions

View solution

Question Text	(A) They are associated with the plasma membrane of cell in prokaryotes. (B) They translate the mRNA into proteins. Above given statements are true for
Topic	Cell: Structure and Functions
Subject	Biology
Class	Class 11

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