Cell-the unit of life practice · Mixed difficulty

What are the differences between plant cell and animal cell among the following ?

(A) Cell wall

(B) Cell membrane

(C) Ribosomes

(D) Centrioles

(E) Large central vacuole

(F) Plastids

Which of the following statement is incorrect about plasmids?

The chemical substances found most abundantly on the middle lamella are released into the phragmoplast by

Analyse the following pairs and identify the correct option given.
I. Chromoplasts – Contain pigments other than chlorophyll
II. Leucoplasts – Devoid of any pigments
III. Amyloplasts – Store proteins
IV. Aleuroplasts – Store oils and fats
V. Elaioplasts – Store carbohydrates

Organisation of a cell has not been achieved in

Bacterial flagellum consists of all of the following components except

Balbiani rings are sites of:

The inward movement of ions into the cells is ……
and the outward movement is….

The term chromosome was coined by?

Select the wrong statement from the following

Which of the given statements are correct? I. $Escherichia\mathrm{ }coli$ is a Gram ($- \mathrm{ve}$) bacteria II. $Bacillus\mathrm{ }subtilis$ is a Gram ($+ \mathrm{ve}$) bacteria III. Working of the Gram’s stain in Gram ($- \mathrm{ve}$) bacteria is due to high lipid content of the cell wall, which gets dissolved in organic solvents like acetone Choose the correct option

The plasmid DNA confers certain unique characters to bacteria in which they are found. This include
I. resistance to antibiotics
II. no resistance to antibiotics
III. monitor bacterial transformation with foreign DNA
The correct option is

a. The passage through which movement of RNA and protein molecules takes place in both
directions in a nuclear pore.
b. A disc-shaped structure is kinetochore is present as a lateral side of centromere.

c. DNA moves easily in both directions through the nuclear pore.

Read the following and select the correct option.

Which of the following statements with respect to Endoplasmic Reticulum is incorrect?

In fluid mosaic model of plasma membrane

Animal cell differs form plant cells in not having the:

The plasma membrane of prokaryotes and eukaryotes are

In the chromosomes the non-staining region is called?

Which of the following plastid is a store house for proteins?

Tubulin protein occurs in

Six tubes containing preparations from animal tissue were set up as shown in the table. Tube contents
(i) Glucose + homogenized cell
(ii) Glucose + mitochondria
(iii) Glucose + cytoplasm lacking organelles
(iv) Pyruvic acid + homogenized cells
(v) Pyruvic acid + mitochondria
(vi) Pyruvic acid + Cytoplasm lacking organelles
After incubation, in which three tubes would carbon dioxide be produced?

Assertion (A): Polar molecules can not pass through non polar lipid bilayer.

Reason (R): Polar molecules require a carrier protein of the membrane to facilitate their transport across the membrane.

Spindle fibres attach on to:

Which of the following statements are correct? I. Occurrence of different types of tissues, organs and organ system results in division of labour II. A new cell always develops by the division of a pre-existing cells III. Cells are totipotent IV. Cell is the smallest unit, capable of independent existence and performing the essential functions of life The correct option is

Cell theory was proposed by

Which of the following statements are false? I. Most cells are tiny and their volume ranges from 1 to 1000 $\mathrm{n}{\mathrm{m}^3}$. II. Some cells have the microvilli to increase the absorptive surface area. III. All cells arise from pre-existing cells. IV. In plants, translocation of solutes is performed by xylem vessels and tracheids. V. According to cell theory, all cells arise from abiotic material.

When the Centrometre is situated in the middle of two equal arms of chromosomes, the chromosome is referred as:

All the statements are correct for prokaryotic cells, except

How many structures are not associated with bacterial cells?

i. Capsid
ii. Polysomes

iii. Fimbriae
iv. Virion

v. Flagella
vi. Naked genetic material

vii. Endomembrane
viii. Mitochondria

Mark the incorrect about ribosomes