NEET biology

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Question
CBSEENBI11025117

A prokaryotic cell lacks :

  • nucleus

  • nuclear membrane

  • membrane bound organelles

  • all of the above

Solution

D.

all of the above

Prokaryotes are unicellular or multicellular organisms. These lack true nucleus, nuclear membrane and membrane bound organelles such as mitochondria, Golgi bodies, lysosomes etc. It also lacks Endoplasmic reticulum or ER.

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Question
CBSEENBI11025118

Extranuclear inheritance is a consequence of the presence of genes in :

  • ER and mitochondria

  • lysosomes and ribosomes

  • ribosomes and chloroplast

  • mitochondria and chloroplasts

Solution

D.

mitochondria and chloroplasts

Mitochondria and chloroplast contain DNA. The extranuclear inheritance or cytoplasmic inheritance is a consequence of the presence of genes in mitochondria and chloroplasts.

Question
CBSEENBI11025119

Vesicles of Smooth Endoplasmic Reticulum (SER) are most likely on their way to :

  • plastids

  • lysosomes

  • nucleolus

  • Golgi apparatus

Solution

D.

Golgi apparatus

Smooth endoplasmic reticulum or SER forms transport vesicles by which large molecules are moved in the cell. Often transport vesicles are on their way to the plasma membrane or another part of the endomembrane system particularly the Golgi apparatus.

Question
CBSEENBI11025120

Lysosomes are the store house of :

  • ATP

  • sugar

  • proteins

  • hydrolytic enzymes

Solution

D.

hydrolytic enzymes

Lysosomes may be formed directly from endoplasmic reticulum (ER). Enzymes are stored within the lysosomes as crystalline form mainly as hydrolytic enzymes. These enzymes are synthesized on RER. These enzymes help in the digestion if required.

Question
CBSEENBI11025122

Lipids are insoluble molecules are :

  • neutral

  • Zwitter ions

  • hydrophobic

  • hydrophilic

Solution

A.

neutral

Lipid is a term used to describe a group of substances in cell, characterized by their solubility in organic solvents such as ether and benzene. These are insoluble in water, because they contain hydrophobic fatty acid chain.