POST UTME CRAWFORD UNIVERSITY 2019 Biology | Objective

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Question 1
A diagram of the human digestive system is shown below. Which of the following structures is responsible for the breakdown of proteins?
A. A
B. B
C. C
D. D
Question 2
In the context of genetics, what is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Mutation
B. Genetic drift
C. Natural selection
D. Heritability
Question 3
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No gene flow
D. No genetic drift
Question 4
The process of coordination involves the integration of different systems to achieve a common goal. Which of the following is a key example of coordination?
A. Respiration
B. Digestion
C. Circulation
D. Excretion
Question 5
The nervous system is responsible for transmitting signals throughout the body. Which of the following is a key type of neuron found in the nervous system?
A. Motor neuron
B. Sensory neuron
C. Interneuron
D. Glia cell
Question 6
In the process of photosynthesis, which of the following is the byproduct of the light-dep\endent reactions?
A. ATP
B. NADPH
C. O2
D. H2O
Question 7
A 2.5-liter solution contains 1.8 liters of ethanol. What is the concentration of ethanol in the solution in grams per liter?
A. 0.72
B. 0.84
C. 0.96
D. 1.08
Question 8
A plant cell is placed in a solution containing 0.1 M glu\cose. If the cell membrane is selectively permeable to glu\cose, what will be the net movement of glu\cose molecules across the cell membrane?
A. Into the cell
B. Out of the cell
C. No net movement
D. Dep\endent on the concentration gradient
Question 9
In the context of genetics, what is the primary function of the centromere in a eukaryotic chromosome?
A. To bind sister chromatids together
B. To facilitate the separation of homo\logous chromosomes
C. To regulate gene expression
D. To maintain chromosomal stability
Question 10
The process of osmoregulation in animals involves the regulation of water and salt balance in the body. Which of the following is a key mechanism involved in osmoregulation?
A. The reabsorption of water and ions in the kidneys
B. The excretion of excess salt through the skin
C. The regulation of hormone levels in the body
D. The movement of ions across cell membranes
Question 11
The process of excretion involves the removal of waste products from the body. Which of the following is a key organ involved in excretion?
A. Kidneys
B. Liver
C. Lungs
D. Skin
Question 12
A diagram of a human cell is shown below. What is the primary function of the mitochondria?
A. Production of ATP
B. Regulation of cell growth
C. Transport of materials across the cell membrane
D. Defense against pathogens
Question 13
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.36
B. 0.64
C. 0.48
D. 0.52
Question 14
In the context of hormonal coordination, what is the primary function of the hypothalamus?
A. Regulation of body temperature
B. Control of hunger and thirst
C. Regulation of hormone secretion
D. Maintenance of blood pressure
Question 15
In the process of cellular respiration, which of the following is the byproduct of glycolysis?
A. ATP
B. NADH
C. FADH2
D. Pyruvate

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