EASY
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Given below is the diagram of Animal cell. Select option giving correct identification of labels X and Y respectively.
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Important Questions on Digestion and Absorption

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Biology>Human Physiology>Digestion and Absorption>The Human Digestive System

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
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
The size of Pleuropneumonia-like Organism (PPLO) is:
MEDIUM
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Microtubules are the constituents of:
EASY
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
If you suspect major deficiency of antibodies in a person, to which of the following would you like for confirmation evidence?
MEDIUM
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Match the following organelles in Group I with the structures in Group II. Choose the correct combination.

Group I Group II
P. Mitochondrion i. Cisternae
Q. Golgi ii. Cristae
R. Chloroplast iii. Thylakoids
S. Centrosome iv. Radial spokes
EASY
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Root pressure is usually acidic because:
MEDIUM
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Fertilization in humans is practically feasible only if:
EASY
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Proteins P, Q, and R are associated with an intact organellar membrane in a cell. If the intact organelle is treated with a high ionic strength buffer, only protein R remained associated with the membrane fraction. Based on this, one could conclude that:
EASY
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
A line is drawn from the exterior of an animal cell to the centre of the nucleus, crossing through one mitochondrion. What is the minimum number of membrane bilayers that the line will cross?
EASY
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Which of the following processes leads to DNA ladder formation?
EASY
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Chromatophores take part in:
EASY
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Which ONE of the following is NOT a function of the small intestine?
EASY
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Which one of the following is not applicable to RNA?
MEDIUM
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Identify the correct order of organization of genetic material from largest to smallest :
MEDIUM
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
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
EASY
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
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?
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MEDIUM
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
The molecular weight of E coil. DNA is 3.1×109 g/mol. The average molecular weight of the nucleotide pair is 660 g/mol and each nucleotide pair contributes to 0.34 nm to the length of DNA. The length of E coli DNA molecule will be approximately:
HARD
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Presence of plastids in Plasmodium suggests:
MEDIUM
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Which of the following pair of organelles does not contain DNA?
EASY
Biology>Human Physiology>Digestion and Absorption>The Human Digestive System
Identify the correct statement with reference to human digestive system.