Top answers

Biology
A Level

Did we evolve from apes? What does the term 'common ancestor' really mean?

You are related to all the humans that are currently living on the planet, even if distantly. However, you are more closely related to your first cousin than you are to a classmate of yours. This is becau...

MA
Answered by Miranda A. Biology tutor
2500 Views

Discuss the bonds which comprise the tertiary structure of protein.

Bonds in a protein's tertiary structure occur entirely between the highly variable R-groups of the amino acyl residues. Firstly, hydrogen bonds further to those in the secondary structure may form between...

JB
Answered by Jamie B. Biology tutor
5774 Views

Name and describe the 4 steps involved in aerobic respiration

Glycolysis- This is the first step which occurs in the cytosol. glucose broken down into pyruvate yielding 2 net atp and 2 pyruvate molecules per glucose. This is the only step in anaerobic respiration. <...

UO
Answered by Uchenna O. Biology tutor
3984 Views

Give 3 differences in structure between DNA and mRNA

DNA contains the nucleotide base thymine whereas mRNA contains the nucleotide base uracil instead

DNA is double stranded, mRNA is single stranded

DNA contains the sugar subunit deoxyribose, ...

CB
Answered by Callum B. Biology tutor
9751 Views

What does the DNA sequence being 'degenerate' mean?

Amino acids are coded for by specific codons. There are some instances where some particular amino acids can be coded for by more than one codon (codon being three nucleotides bonded together). This is kn...

BN
Answered by Bibi N. Biology tutor
9455 Views

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