☰ Contents · Biology (Cytology and genetics)

Chemosynthesis and protein biosynthesis

Lessons 34–35 · 2 lessons · A. Zikiryayev, A. To‘xtayev, I. Azimov, N. Sonin. Biology. Basics of Cytology and Genetics, Grade 9, revised and expanded 5th edition. “Yangiyul Poligraph Service”, Tashkent, 2019
Answers are for parents and teachers.
1
Compare chemosynthesis and photosynthesis in a table: energy source, pigment, example.
2
If a DNA strand is TACCCGAAA, write the mRNA and find the protein from the table.
3
A protein consists of 80 amino acids. How many nucleotides are in the coding gene segment (one strand)?
4
What is the length in nm of the part coding a 200-amino-acid protein? (spacing 0.34 nm = 34/100 nm)
5
Why must DNA double (replication) before division?