How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.
If a person has two alleles of the sickle cell anaemia gene, the person
is a heterozygous carrier of the disease
is immune to the disease and cannot pass it on to an offspring
has the disease
is probably of Asian ancestry
Correct answer is C
No explanation has been provided for this answer.
Which of the following statements best describes protein synthesis?
DNA is directly involved in translation
translocating the ribosomes exposes a new codon for base pairing with an amino acid
Each tRNA with a particular anticodon always carries a different protein in the process
One amino acid is always carried by more than one
Correct answer is A
No explanation has been provided for this answer.
Differences in characteristics observed between individuals of the same species is known as
trait
phenotype
mutation
variation
Correct answer is D
No explanation has been provided for this answer.
received from parents
passed to offspring
caused by the environment
caused by mutation
Correct answer is C
No explanation has been provided for this answer.
Which of the following statements is not true about continuous variation? It
is usually controlled by several genes
can be influenced by environmental factors
follows a normal distribution curve
is usually controlled by one or two pair(s) of genes
Correct answer is D
No explanation has been provided for this answer.