Cell parameters - class-VIII
A cell weighing 1 mg grows to double its initial mass before dividing into two daughter cells of equal mass. Assuming no death, at the end of 100 divisions what will be the ratio of the mass of the entire populations of these cells to that of the mass of the Earth? Assume that mass of the Earth is $10^{24}Kg$ and $2^{10}$ is approximately equal to $1000$.
Hybridoma cells are
The organism made up of only a single cell is known as
Which of these is a multicellular organism?
Cells vary in shape from 0.1 mm to 1 m.
Which one from the following is an example of multicellular organism?
Efficient large-sized cells are
Which of following organisms can be seen only under the microscope?
Which one is enucleated?
Forthe formation of diploid cells from haploid cells, colchicine is used to
Growth at cellular level, is principally a consequence of increase in the amount of
Which of the following factors affect a cell's surface area to volume ratio?
(I) Cell size
(II) Presence of selectively permeable membrane
(III) Presence of a convoluted membrane
(IV) Presence of many membrane transport protein
Refer to the following table for your possible answer.
| Cell types analysed | Average mass of DNA/cell (x $10^{-11}$g) |
|---|---|
| X | $0.00$ |
| Y | $3.35$ |
| Kidney | $6.70$ |
| Lung | $6.70$ |
What is the correct identify of cell type X and Y?
The maximum work that a standard Daniell cell can do before it stops working is
$[1 \,F = 96487\, C\, mol^{-1}\, and\, E^o = 1.1 V]$
The surface area to volume ratio increase as the cell size
Smaller cells have
Large cells have a
When a cell of $2\mu$$m$ diameter grows to double its diameter, its surface area: volume relationship will _____________.
Metabolically active cells have
Volumes of prokaryotic and eukaryotic cells are ........... respectively.
A bacterium divides every 35 minutes . If a culture containing $ 10^5$ cell per ml is grown for 175 minutes. What will be the cell concentration per ml after 175 mts _______________.
Read the given statements and select the correct option.
(i) One maize root cell can give rise to more than 17,500 cells.
(ii) A cell in watermelon can increase in size upto 3,50,000 times.
(iii) The growth of pollen tube is measured in terms of length.
(iv) The growth of the leaf is measured in term of surface area.
The average volume of a eukaryotic cell is