Helix Knowledge Point

20/07/2026

Tryptophan Operon: Attenuation
Leader mRNA (trpL)
The leader region is about 162–166 nucleotides long and contains four segments:
1, 2, 3, and 4
These regions can form alternative stem-loop structures.
When Tryptophan is High
Ribosome quickly translates the leader peptide because charged tRNAᵀʳᵖ is abundant.
Region 2 becomes unavailable.
Regions 3 and 4 pair together.
This forms a 3–4 hairpin (terminator hairpin)

10/10/2025

Regulation of tryptophan peron by Atinuation

07/10/2025

In 2025, the Nobel Prize in Physiology or Medicine was awarded to Mary E. Brunkow, Fred Ramsdell, and Shimon Sakaguchi for their important discovery about how our immune system avoids attacking our own body.
They studied a special kind of white blood cells called regulatory T cells (or T-regs). These cells act like brakes — they help stop the immune system from mistakenly harming healthy tissues.
The scientists also found a gene called FOXP3, which is essential for these T-regs to work properly. When FOXP3 is mutated or not working, autoimmune diseases can arise (where the body attacks itself).
Their discovery is very important because it gives scientists a clearer understanding of autoimmune diseases, organ transplantation, and how to design treatments that regulate the immune system without harming it.

16/09/2025

Lactose Operon

04/04/2025

For the Second Semester students ( BA, B.Sc. , B.Com

The Content of the video is very help full for all the UG Second semester student according to NEP and also for Competitive exam aspirants.

04/04/2025

B.Sc . Third Year Zoology ( VI Semester Students )
# Evolutionary and Developmental Biology
https://youtu.be/vAD3unjVkFc?si=FMEoBpN9ltGeBwyy

This video contain the solution of B.Sc. Sixth Semester Zoology( Evolutionary and Developmental Biology) Question paper (2024) but The content of video is...

27/01/2025

Celebrating my 1st year on Facebook. Thank you for your continuing support. I could never have made it without you. 🙏🤗🎉

04/10/2024

For the Students of B.Sc. First Semester Zoology
# NEET Biology
# Genetics
# Karyotype

https://youtu.be/Jl_WGBARoUE?si=oK3fvTgsiIQWIKxS

The content of the video explains the Karyotype and karyotyping. Karyotyping is basically the subtopic of cytogenetics. this topic is important for UG and P...

05/05/2024

https://youtu.be/hcVFS1N7ZQ4?si=BaUdI25JnLrNlLNg Curricular
# First Aid and Health
# Second Semester
# प्राथमिक चिकित्सा और स्वास्थ्य

The Content of the video is very help full for all the UG Second semester student according to NEP and also for Competitive exam aspirants.

27/04/2024

https://youtu.be/HF0qbeVpFeQ?si=vhGtCoN9PxrObNnu
# Co Curricular Second Semester
# First Aid and Health
# प्राथमिक चिकित्सा और स्वास्थ्य

The Content of the video is very help full for all the UG Second semester student according to NEP and also for Competitive exam aspirants.