Montreal protocol was signed in 1987 for control of:

NEET-(Sept)2020 Environmental-Issues [class-xii ]

• Transport of Genetically modified organisms from one country to another
• Emission of ozone depleting substances
• Release of Green House gases
• Disposal of e-wastes
Correct Option: B  [ Emission of ozone depleting substances ]

Remark:

For the commercial and industrial production of Citric Acid, which of the following microbes is used?

NEET-(Oct)2020 Microbes-in-Human-Welfare [class-xii ]

• Aspergillus niger
• Lactobacillus sp
• Saccharomyces cerevisiae
• Clostridium butylicum
Correct Option: A  [ Aspergillus niger ]

Remark:

Spooling is:

NEET-(Oct)2020 Biotechnology-Principles-and-Processes [class-xii ]

• Amplification of DNA
• Cutting of separated DNA bands from the agarose gel
• Transfer of separated DNA fragments to synthetic membranes
• Collection of isolated DNA
Correct Option: D  [ Collection of isolated DNA ]

Remark:

The sequence that controls the copy number of the linked DNA in the vector, is termed:

NEET-(Sept)2020 Biotechnology-Principles-and-Processes [class-xii ]

• Selectable marker
• Ori site
• Palindromic sequence
• Recognition site
Correct Option: B  [ Ori site ]

Remark:

Match the following organisms with their respective characteristics:

NEET-2019 Animal-Kingdom [class-xi ]

• (A)-(III), (B)-(II), (C)-(I), (D)-(IV)
• (A)-(III), (B)-(II), (C)-(IV), (D)-(I)
• (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
• (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
Correct Option: D  [ (A)-(III), (B)-(IV), (C)-(II), (D)-(I) ]

Remark:

Consider following features:
(A) Organ system level of organisation
(B) Bilateral symmetry
(C) True coelomates with segmentation of body
Select the correct option of animal groups which possess all the above characteristics.

NEET-2019 Animal-Kingdom [class-xi ]

• Annelida, Arthropoda and Mollusca
• Annelida, Arthropoda and Chordata
• Arthropoda , Mollusca and Chordata
• Annelida, Mollusca and Chordata
Correct Option: B  [ Annelida, Arthropoda and Chordata ]

Remark:

The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in:

NEET-2019 Structural-Organisation-in-Animals [class-xi ]

• Bronchioles and Fallopian tubes
• Bile duct and Bronchioles
• Fallopian tubes and Pancreatic duct
• Eustachian tube and Salivary duct
Correct Option: A  [ Bronchioles and Fallopian tubes ]

Remark:

Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth:

NEET-2019 Structural-Organisation-in-Animals [class-xi ]

• Pharynx → Oesophagus → Gizzard → Crop → Ileum → Colon → Rectum
• Pharynx → Oesophagus → Gizzard → Ileum → Crop → Colon → Rectum
• Pharynx → Oesophagus → Ileum → Crop → Gizzard → Colon → Rectum
• Pharynx → Oesophagus → Crop → Gizzard → Ileum → Colon → Rectum
Correct Option: D  [ Pharynx → Oesophagus → Crop → Gizzard → Ileum → Colon → Rectum ]

Remark:

Match the following structures with their respective location in organs:

NEET-2019 Digestion-and-Absorption [class-xi ]

• (A)-(III), (B)-(I), (C)-(II), (D)-(IV)
• (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
• (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
• (A)-(III), (B)-(II), (C)-(I), (D)-(IV)
Correct Option: C  [ (A)-(III), (B)-(IV), (C)-(I), (D)-(II) ]

Remark:

Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes:

NEET-2019 Digestion-and-Absorption [class-xi ]

• Duodenal Cells
• Oxyntic Cells
• Goblet Cells
• Chief Cells
Correct Option: C  [ Goblet Cells ]

Remark: