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Biology NEET - XI: Chapter 8- Cell the unit of life Part 6

Biology25 CardsCreated about 2 months ago

This deck covers key concepts from Chapter 8 of the NEET Biology syllabus, focusing on the cell as the unit of life. It includes questions about cellular structures, organelles, and chromatin.

What is centrosphere?

It is the amorphous cytoplasm surrounding centrioles
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Key Terms

Term
Definition
What is centrosphere?
It is the amorphous cytoplasm surrounding centrioles
Where are centrosomes located?
Near the nuclear membrane
Which organelle forms the basal body?
Centrosome
What microtubular arrangement is present in centrioles?
9+0
Oocytes lack which cell organelle?
Centriole
What do the linker proteins link in a centriole?
Adjacently placed A and C microtubules

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TermDefinition
What is centrosphere?
It is the amorphous cytoplasm surrounding centrioles
Where are centrosomes located?
Near the nuclear membrane
Which organelle forms the basal body?
Centrosome
What microtubular arrangement is present in centrioles?
9+0
Oocytes lack which cell organelle?
Centriole
What do the linker proteins link in a centriole?
Adjacently placed A and C microtubules
What is the core of cilia/flagella of eukaryotes called?
Axoneme
What is the difference between the peripheral microtubules of centriole and flagella?
Centriole- peripheral triplets | Flagella- peripheral doublets
What links the adjacent peripheral microtubule doublets in flagella/cilia?
Nexin protein
What are the radial spokes of cilia/flagella made of?
Nexin protein
What is the central sheath of axoneme made of in cilia/flagella?
Dyenin protein
What are the inner and outer arms of peripheral microtubules made of in cilia/flagella?
Dyenin protein
What acts as ATPase enzyme in cilia/flagella?
Dyenin protein
What is the pH of nucleoplasm?
7.2 to 7.5
What makes the nucleoplasm basic in nature?
Presence of large amounts of nucleosides
How many histone proteins are present in a nucleosome?
5 types of histone proteins
Which histone protein is called the linker protein?
H1
Which is more condensed- euchromatin or heterochromatin?
Heterochromatin
Which gets lightly stained- euchromatin or heterochromatin?
Euchromatin
What is the shape of heterochromatin?
Solenoid
Which type of chromatin is present in nucleolus?
Heterochromatin
What is the ribosomal factory of cell?
Nucleolus
Which animal has maximum number of chromosomes?
aulacanthus
Which plant has maximum number of chromosomes?
Ophioglossum
Which animal has minimum number of chromosome?
Ascaris