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POST UTME IGBINEDION UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1

In a forest e\cosystem, the presence of a keystone species can lead to a cascade effect on other species. Which of the following is an example of a keystone species?

A. Wolf

B. Grizzly bear

C. Mountain lion

D. Gray wolf

Question 2

The diagram below shows the structure of a human eye.

A. The cornea is labeled A

B. The iris is labeled B

C. The retina is labeled C

D. The lens is labeled A

Question 3

A population of bacteria is growing exponentially with a growth rate of 0.2 per hour. If the initial population size is 100 individuals, what is the population size after 3 hours?

A. 200

B. 300

C. 400

D. 500

Question 4

A 5.0 g sample of a subs\tance is dissolved in 50 mL of water. If the molarity of the solution is 0.1 M, what is the molar mass of the subs\tance?

A. 20 g/mol

B. 50 g/mol

C. 100 g/mol

D. 200 g/mol

Question 5

The human eye has a unique structure that allows it to detect light and transmit visual information to the brain. Which of the following is a part of the human eye that plays a crucial role in this process?

A. Cornea

B. Iris

C. Retina

D. Lens

Question 6

A plant with the genotype 'RR' is crossed with a plant with the genotype 'rr'. What is the genotype of the offspring?

A. Rr

B. Rr

C. RR

D. rr

Question 7

In a tropical rainforest, the primary consumers are primarily herbivores. Which of the following organisms would be a primary consumer in this e\cosystem?

A. A deer

B. A grasshopper

C. A fungus

D. A bacterium

Question 8

In a photosynthetic pathway, the light-dep\endent reactions occur in the thylakoid membranes of the chloroplast. What is the primary function of the light-dep\endent reactions?

A. To produce ATP and NADPH

B. To produce glu\cose and oxygen

C. To produce starch and cellulose

D. To produce proteins and lipids

Question 9

The diagram below shows the structure of a human eye. What is the function of the lens?

A. To regulate the movement of subs\tances

B. To synthesize proteins

C. To focus light on the retina

D. To store genetic information

Question 10

The process of mitosis is characterized by the replication of DNA and the separation of chromosomes.

A. True

B. False

C. The process of mitosis is characterized by the replication of DNA and the separation of chromatids

D. The process of mitosis is characterized by the replication of DNA and the separation of chromosomes

Question 11

In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'R'?

A. 0.8

B. 0.6

C. 0.4

D. 0.2

Question 12

A cell membrane is selectively permeable because it has specific channels and transport proteins that allow certain molecules to pass through while keeping others out. What is the primary function of these channels and transport proteins?

A. To regulate the movement of ions and molecules across the membrane

B. To synthesize glu\cose from CO2

C. To oxidize water to produce oxygen

D. To reduce NADP+ to NADPH

Question 13

The excretory system of a human consists of the kidneys, ureters, bladder, and urethra. Which of the following is a function of the kidneys?

A. To synthesize proteins

B. To regulate the movement of subs\tances

C. To filter waste products from the blood

D. To store genetic information

Question 14