Which of the following statements is not correct ?
Lysosomes have numerous hydrolytic enzymes.
The hydrolytic enzymes of lysosomes are active under acidic .
Lysosomes are membrane bound structures.
Lysosomes are formed by the process of packaging in the endoplasmic reticulum.
Which of the following statements regarding mitochondria is incorrect ?
Outer membrane is permeable to monomers of carbohydrates, fats and proteins.
Enzymes of electron transport are embedded in outer membrane.
Inner membrane is convoluted with infoldings.
Mitochondrial matrix contains single circular DNA molecule and ribosomes.
answer 2 is correct
The concept of " Omnis cellula -e-cellula" regarding cell division was first proposed by:
Which of the following pair of organelles does not contain DNA?
Mitochondria and Lysosomes
Chloroplast and Vacuole
Lysosomes and Vacuoles
Nuclear envelope and Mitochondria
The shorter and longer arm of a sub-metacentric chromosomes are referred as:
s- arm and l-arm respectively
p - arm and q- arm respectively
q- arm and p - arm respectively
m - arm and n - arm respectively
Correct sequence of phases in cell cycle is
M → G1→G2 → S
G1 → G2 → S → M
S→ G1 → G2 → M
G1 → S → G2 → M
A. Coenzymes or metal ion that is tightly bound to enzymes protein is called prosthetic group.
B. A complete catalytic active enzymes with its bound prosthetic group is called apoenzyme.
Both A and B are true
A is true but B is false
Both A and B are false
A is false but B is true
Concanavalin A is:
an essential oil
Cells in G0 phase:
exit the cell cycle
enter the cell cycle
suspend the cell cycle
terminate the cell cycle
DNA precipitation out of mixture of biomolecules can be achieved by treatment with:
Methanol at room temperature
Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with
Components : (i) Cristae of mitochondria (ii) Inner membrane of mitochondria (iii) Cytoplasm (iv) Smooth endoplasmic reticulum (v) Rough endoplasmic reticulum (vi) Mitochondrial matrix (vii) Cell vacuole (viii) Nucleus The correct components are
A - (i) , B-(iv) , C-(viii) , D-(vi)
A-(vi), B-(v),C-(iv), D-(vii)
A-(v), B-(i), C-(iii), D-(ii)
A-(v), B-(iv) ,C-(viii), D-(iii)
select the wrong statement
Bacterial cell wall is made up of peptidoglycan
Pili and fimbriae are mainly involved in motility of bacterial cells
Cyanobacteria lack flagellated cells.
Mycoplasma is a wall-less microorganism
select the mismatch
Gas vacuoles-Green bacteria
Large central vacuoles – Animal cells
Protists – Eukaryotes
Match the stages of meiosis in Column I to their characteristic feature in Column II and select the correct option using the codes given below:
|Column I||Column II|
(i) Paring of homologous chromosomes
b. Metaphase I
(ii) Terminalization of chiasmata
(iii) Crossing-over takes place
(iv) Chromosomes align at equatorial plate
a b c d
(iii) (iv) (ii) (i)
(i) (iv) (ii) (iii)
(ii) (iv) (iii) (i)
(iv) (iii) (ii) (i)
Select the mismatch.
Gas vacuoles - Green bacteria
Large central vacuoles - Animal cells
Protists - Eukaryotes
Methanogens - Prokaryotes
During cell growth, DNA synthesis takes place in