Biology
Practice Biology MCQs from the Science syllabus.
The specific sequence of three nucleotides on tRNA that pairs with a codon on mRNA is called:
In a DNA molecule, the strands are 'antiparallel'. This means:
What is the phenotypic ratio in the F2 generation of a dihybrid cross if the traits show incomplete dominance?
An individual with the genotype AaBb will produce how many types of gametes?
Which of the following is an example of continuous variation?
A mutation that involves the replacement of a single nitrogenous base with another is called:
In a test cross involving F1 dihybrid (RrYy), the phenotypic ratio will be:
In a cross between homozygous dominant and heterozygous individuals, what is the probability of recessive phenotype?
The enzyme that joins DNA fragments (like Okazaki fragments) is:
The phenomenon where one gene influences multiple, seemingly unrelated phenotypic traits is called: