MEDIUM
Earn 100
Identify the correct statements from the options regarding the useful examples of diffusion every day:
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Important Questions on Transportation in Plants & Animals
EASY
Which one of the following is not applicable to RNA?
MEDIUM
Identify the correct order of organization of genetic material from largest to smallest :
EASY
Chromatophores take part in:
MEDIUM
The molecular weight of E coil. DNA is . The average molecular weight of the nucleotide pair is and each nucleotide pair contributes to 0.34 nm to the length of DNA. The length of E coli DNA molecule will be approximately:
MEDIUM
Fertilization in humans is practically feasible only if:
EASY
Proteins and are associated with an intact organellar membrane in a cell. If the intact organelle is treated with a high ionic strength buffer, only protein remained associated with the membrane fraction. Based on this, one could conclude that:
EASY
If you suspect major deficiency of antibodies in a person, to which of the following would you like for confirmation evidence?
HARD
Gene regulation governing lactose operon of E. coli that involves the lac I gene product is:
MEDIUM
Microtubules are the constituents of:
MEDIUM
Mitochondria and chloroplast are:
(i) Semi - autonomous organelles
(ii) Formed by the division of pre-existing organelles and they contain DNA but lack protein synthesizing machinery
Which one of the following option is correct?
EASY
The schematic below describes the states of the lac operon in the absence of lactose. Which ONE of the following happens when lactose is present in the cell?
EASY
In simple organisms, exchange of gases and excretion occurs through –
HARD
Nuclear envelope is a derivative of:
MEDIUM
Match the columns and identify the correct option.
| Column I | Column II | ||
| A | Thylakoids | (i) | Disc-shaped sacs in Golgi apparatus |
| B | Cristae | (ii) | Condensed structure of DNA |
| C | Cisternae | (iii) | Flat membranous sacs in stroma |
| D | Chromatin | (iv) | Infoldings in mitochondria |
MEDIUM
In sea urchin DNA, which is double-stranded, of the bases were shown to be cytosine. What are the percentages of other three bases expected to be present in this DNA?
EASY
Which one of the following is not an inclusion body found in prokaryotes?
HARD
Select the correct matching in the following pairs:
EASY
Root pressure is usually acidic because:
EASY
The movement of molecules during diffusion can be described through all of the following except -
EASY
The plasma membrane (pm) forms the boundary of lung cells. Which of the following statements is true for the pm?
A. Plasma membrane is a semipermeable membrane
B. Water moves across the pm by osmosis.
C. O2 and CO2 can cross the pm by diffusion.
D. Na+ and K+ ions can pass the pm by diffusion.
