RNA interference is used for which of the following purposes in the field of biotechnology?

NEET-(Oct)2020 Biotechnology-and-its-applications [class-xii ]

• to develop a plant tolerant to abiotic stresses
• to develop a pest resistant plant against infestation by nematode
• to enhance the mineral usage by the plant
• to reduce post harvest losses
Correct Option: B  [ to develop a pest resistant plant against infestation by nematode ]

Remark:

The laws and rules to prevent unauthorised exploitation of bio-resources are termed as:

NEET-(Oct)2020 Biotechnology-and-its-applications [class-xii ]

• Biopatenting
• Bioethics
• Bioengineering
• Biopiracy
Correct Option: A  [ Biopatenting ]

Remark:

Floridean starch has structure similar to:

NEET-(Sept)2020 Biomolecules [class-xi ]

• Starch and cellulose
• Amylopectin and glycogen
• Mannitol and algin
• Laminarin and cellulose
Correct Option: B  [ Amylopectin and glycogen ]

Remark:

According to Robert May, the global species diversity is about:

NEET-(Sept)2020 Biodiversity-and-Conservation [class-xii ]

• 1.5 million
• 20 million
• 50 million
• 7 million
Correct Option: D  [ 7 million ]

Remark:

Which of the following is correct about viroids?

NEET-(Sept)2020 Biological-Classification [class-xi ]

• They have RNA with protein coat.
• They have free RNA without protein coat.
• They have DNA with protein coat.
• They have free DNA without protein coat.
Correct Option: B  [ They have free RNA without protein coat. ]

Remark:

Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G₀). This process occurs at the end of:

NEET-(Sept)2020 Cell-Cycle-and-Cell-Division [class-xi ]

• M phase
• G₁phase
• S phase
• G₂phase
Correct Option: A  [ M phase ]

Remark:

Select correctly written scientific name of Mango which was first described by Carolus Linnaeus:

NEET-2019 The-living-World [class-xi ]

• Mangifera indica Car. Linn.
• Mangifera indica Linn.
• Mangifera indica
• Mangifera Indica
Correct Option: B  [ Mangifera indica Linn. ]

Remark:

Which of the following statements is incorrect ?

NEET-2019 Biological-Classification [class-xi ]

• Viroids lack a protein coat
• Infective constituent in viruses is the protein coat
• Viruses are obligate parasites
• Prions consist of abnormally folded proteins
Correct Option: B  [ Infective constituent in viruses is the protein coat ]

Remark:

Placentation in which ovules develop on the inner wall of the ovary or in peripheral part, is:

NEET-2019 Morphology-of-Flowering-Plants [class-xi ]

• Basal
• Free central
• Axile
• Parietal
Correct Option: D  [ Parietal ]

Remark:

Persistent nucellus in the seed is known as:

NEET-2019 Morphology-of-Flowering-Plants [class-xi ]

• Perisperm
• Chalaza
• Hilum
• Tegmen
Correct Option: A  [ Perisperm ]

Remark: