Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Movement of substances between the nucleus and the cytoplasm occurs through:
The nuclear pores are the passages through which movement of RNA and protein molecules takes place in both directions between the nucleus and the cytoplasm.
Nucleoplasm is another name for:
The NCERT states, 'The nuclear matrix or the nucleoplasm contains nucleolus and chromatin.'
In which blood corpuscles, the HIV undergoes replication and produces progeny viruses?
HIV infects and replicates inside helper T (T_H / CD4⁺) cells.
Which of the following is not a cloning vector?
Probe is a labelled DNA/RNA fragment used for detection, not a cloning vector.
Once the undigested and unabsorbed substances enter the caecum, their backflow is prevented by:
The ileo-caecal valve prevents backflow from the caecum into the ileum.
Match List I with List II:
| List I | List II |
|---|---|
| A. P-wave | I. Beginning of systole |
| B. Q-wave | II. Repolarisation of ventricles |
| C. QRS complex | III. Depolarisation of atria |
| D. T-wave | IV. Depolarisation of ventricles |
P → atrial depol; Q → start of systole; QRS → ventricular depol; T → ventricular repol.
A: Amniocentesis for sex determination is one of the strategies of Reproductive and Child Health Care Programme. R: Ban on amniocentesis checks increasing menace of female foeticide.
Amniocentesis for sex determination is LEGALLY BANNED in India, not promoted. R is true.
Match List I with List II:
| List I (Lac operon gene) | List II (Product) |
|---|---|
| A. Gene 'a' | I. β-galactosidase |
| B. Gene 'y' | II. Transacetylase |
| C. Gene 'i' | III. Permease |
| D. Gene 'z' | IV. Repressor protein |
a → transacetylase, y → permease, i → repressor, z → β-galactosidase.
Which one of the following techniques does not serve the purpose of early diagnosis of a disease for its early treatment?
Routine serum/urine analyses do not give early molecular-level diagnosis like rDNA, PCR, or ELISA.
Statement I: Electrostatic precipitator is most widely used in thermal power plant. Statement II: Electrostatic precipitator in thermal power plant removes ionising radiations.
ESP removes particulate matter (not ionising radiation) from flue gas.
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