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Biology NEET - XI: Chapter 8- Cell the unit of life Part 7

Biology30 CardsCreated about 2 months ago

This deck covers key concepts from Chapter 8 of the Biology NEET syllabus, focusing on the cell as the unit of life. It includes questions on chromosomal structures, cell components, and their functions.

How many chromatonemata are present in a chromosome?

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Key Terms

Term
Definition
How many chromatonemata are present in a chromosome?
2
What is NOR?
Nuclear organizing region, aka secondary centromere
In which chromosomes is primary constriction located?
All chromosomes
Which nitrogenous bases are the chromosomal constrictions rich in?
Adenine and thymine
What is a v-shaped chromosome?
Metacentric chromosome
What is a L-shaped chromosome?
Sub-metacentric chromosome

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TermDefinition
How many chromatonemata are present in a chromosome?
2
What is NOR?
Nuclear organizing region, aka secondary centromere
In which chromosomes is primary constriction located?
All chromosomes
Which nitrogenous bases are the chromosomal constrictions rich in?
Adenine and thymine
What is a v-shaped chromosome?
Metacentric chromosome
What is a L-shaped chromosome?
Sub-metacentric chromosome
What is a J-shaped chromosome?
Acrocentric chromosome
What is an i- shaped chromosome?
Telocentric chromosome
Polytene chromosomes are found in
Salivary glands of insects
What is the function of polytene chromosomes?
Synthesise proteins required for metamorphosis
Who discovered polytene chromosome?
Balbiani
Lamp brush chromosomes are found in
Oocytes of insects/amphibians
Which is bigger- giant chromosome or lampbrush chromosome?
Lamp-brush chromosome
What is the function of lamp-brush chromosomes?
Contain yolk producing genes
Which multiply faster- prokaryotes or eukaryotes?
Prokaryotes
Mesosomes occur in the form of
Vesicles, tubules and lamellae
Inclusion bodies in prokaryotes are bound to
They are free
Which part of cell envelope of plant cell helps in cell to cell recognition?
Cell wall
Can the primary cell wall grow?
Yes
What happens to the primary cell wall as it matures?
It diminishes
Are vacuoles a part of endomembrane system?
Yes
Where is the luminal compartment of cells?
Inside ER
Which ER is continuous with the nuclear membrane?
RER
The cis and trans face of golgi bodies are similar. True or false?
False
How do mitochondria divide?
Fission
How many chloroplasts are present in a mesophyll cell?
20 to 40
Which tubules connect grana?
Stroma lamellae
What does the 'Svedberg' unit signify?
Density and size
Which dyes stain the chromatin?
Basic dyes
Who coined the term 'chromatin'?
Flemming