POST UTME GREENFIELD UNIVERSITY 2019 Biology | Objective
Practice these randomly selected questions to test your readiness.
Question 1
A population of bacteria is growing exponentially. If the initial population is 100 and the population doubles every 2 hours, what is the population after 6 hours?
Question 2
In a xylem vessel, what is the primary mechanism by which water is transported from the roots to the leaves?
Question 3
A study on the genetics of a certain trait in a population of mice revealed that the trait is inherited in an autosomal dominant pattern. If a mouse has the genotype 'AA' and is crossed with a mouse that has the genotype 'Aa', what is the probability that the offspring will have the genotype 'AA'?
Question 4
The Hardy-Weinberg principle states that the frequency of alleles in a population will remain cons\tant from generation to generation if certain conditions are met. Which of the following is NOT one of the conditions?
Question 5
The process of cellular respiration involves the breakdown of glu\cose to produce ATP. Which of the following stages of cellular respiration is responsible for the production of NADH?
Question 6
A 0.5-metre-tall plant is placed in a pot with a 1-metre-tall plant. The ratio of the heights of the two plants is 1:2. What is the ratio of their areas?
Question 7
A researcher is studying the effect of temperature on the rate of photosynthesis in a certain type of plant. The rate of photosynthesis is given by the equation R = 2e^(0.5T), where T is the temperature in degrees Celsius. If the temperature is 25°C, what is the rate of photosynthesis?
Question 8
A 2.5-metre-tall tree is observed to cast a shadow of 1.8 metres. At the same time, a nearby object casts a shadow of 0.9 metres. How tall is the nearby object?
Question 9
A diagram of the human digestive system is shown below. Which of the following structures is responsible for the breakdown of proteins?
Question 10
A population of rabbits is growing at a rate of 20% per year. If the population is currently 1000, what will be the population after 5 years?
Question 11
A tissue is composed of a mixture of cell types that work together to perform a specific function. Which of the following types of tissues is most likely to be composed of a mixture of cell types?
Question 12
A neuron has a resting membrane potential of -70mV. What is the primary mechanism by which the neuron becomes depolarized?
Question 13
In a tropical rainforest e\cosystem, what is the primary mechanism by which nutrients are cycled from dead organisms to living ones?
Question 14
The diagram below represents the structure of a bacterial cell. Which of the following organelles is responsible for protein synthesis?
Question 15
A plant grows in a pot with a mixture of soil and sand. The plant's roots grow deeper into the soil, and the plant's leaves grow towards the light. What is the name of the process by which the plant grows towards the light?
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