Cell-the unit of life practice · Mixed difficulty

An organelle with an internal cross-section showing characteristic “9 + 2” array is the?

Which one of the following remains absent in prokaryotes?

Assertion (A): The chromoplasts contain fat soluble carotenoid pigments.
Reason (R): These pigments provide colour to plant parts other than green.

In eukaryotic cells, the amount of basic proteins is often found to be

$A:$ Metabolically active cells do not have vacuoles generally.

$R:$ Water and minerals in metabolically active cells are consumed, not to be stored.

Find out the incorrect statements:

1)Blue - green alga is a prokaryotic cell

2)WBC is ameboid in shape

3) Mycoplasma is the largest cell

4) Microbodies are cell organelles

5) Prokaryotes do not exhibit a wide variety of shapes

In eubacteria, a celluler component that resembles eukaryotic cells is

The component of endomembrane system that may have ribosomes on its surface
a. Is specialized in the synthesis of lipids
b. Is site of protein synthesis
c. Helps in formation of plasma membrane during cytokinesis
d. Consists of cisternae, vesicle and tubules
Choose the correct one(s).

Plasmodesmata connections helps in

Which one of the following organisms is not an example of eukaryotic cells?

In eukaryotes, the cell wall constitutes

Which one of the following is not related to ribosome?

Choose the correct statements
I. Passive cells are larger in size
II. Larger cells have lower surface volume ratio
III. To remain active, larger cells are either cylindrical in shape or possess several extensions of the cell membrane, like microvilli
IV. Microvilli are found in all those cells, which are active in absorption
V. Microvilli (membrane infoldings) occurs in transfer cells found in plants in the region of absorption or secretion of nutrients
Option containing all correct statements is

Which of the following differentiate plant cells from animal cells?

[A]: Pectins are abundant in middle lamella in plant cells.

[R]: Some cells in woody plants have a secondary wall that is found inside the primary wall.

In eukaryotes, basic structural unit made up of histone and DNA is

Which statement is not true about prokaryotes?

Select the odd one w.r.t cell organelles and their functions.

Plant and animal cells, both have

Keeping is view the structure of cell membrane, which one of the following statements is correct with respect to the movements of liquid and proteins from one liquid monolayer to the other (flip flop movement)

Term basal body is associated with the development of

Primary wall of eukaryotic cell is …A… layered but secondary wall is …B… layered
Here, A and B refer to

Which of the following is the filler substance of the matrix of eukaryotic cell?

Cell is the fundamental structural and functional unit of all living organisms. This was evidenced by the fact that

Lipids of plasma membrane

a. Are arranged in a bilayer

b. Have non-polar head and polar tail

c. Are responsible for quasi-fluid nature

Assertion: On the position of centromere the
shape of chromosomes is based.

Reason: The chromosome bends in the region
of centromere during anaphase.

Barophilic prokaryotes

A cell’s division time is 1 minute. In 20 minutes, a culture tube is 1/8th filled with cells. When the tube will be fully filled?

Which of the following is true about microbodies:

Which of the following statements are correct about prokaryotic genetic material (DNA)?
I. DNA is naked, that is without histones
II. DNA is usually circular/single chromosome
III. Outside the genomic DNA, small circular DNA is also present in many bacteria
IV. The smallest DNA are called plasmids