POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2019 Biology | Objective

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Question 1 View Details
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'?
Correct A. 0.36
B. 0.64
C. 0.72
D. 0.88

Correct Answer: A

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Question 2 View Details
A plant cell has a vacuole that contains 0.5 M sucrose solution. If the cell membrane is permeable to water but not to sucrose, what will happen to the cell's turgor pressure?
Correct A. Increase
B. Decrease
C. Remain the same
D. Become negative

Correct Answer: A

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Question 3 View Details
A diagram of a plant's xylem is shown below. Which of the following is a characteristic of the xylem tissue?
Correct A. It is composed of tracheids and xylem vessels
B. It is composed of xylem parenchyma and xylem fibers
C. It is composed of phloem and xylem
D. It is composed of only tracheids

Correct Answer: A

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Question 4 View Details
A diagram of a human kidney is shown below. Which of the following is a function of the renal corpuscle?
Correct A. It filters the blood to remove waste products
B. It reabsorbs water and electrolytes from the filtrate
C. It regulates blood pressure
D. It produces hormones

Correct Answer: A

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Question 5 View Details
A diagram of a human heart is shown below. Which of the following is a characteristic of the cardiac muscle?
A. It is striated
B. It is involuntary
Correct C. It is composed of cardiac myocytes
D. It is composed of skeletal myocytes

Correct Answer: C

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Question 6 View Details
In the context of evolutionary theory, what is the primary mechanism by which genetic drift acts to reduce genetic variation within a population?
A. Mutation
B. Genetic recombination
C. Gene flow
Correct D. Genetic drift

Correct Answer: D

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Question 7 View Details
A researcher isolates a microorganism that exhibits both aerobic and anaerobic respiration. What is the most likely metabolic pathway this organism uses?
A. Citric acid cycle
B. Glycolysis
C. Electron transport chain
Correct D. Both A and C

Correct Answer: D

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Question 8 View Details
A geneticist observes that a particular trait in a population is influenced by multiple genes. What type of inheri\tance pattern is this an example of?
A. Autosomal dominant
B. Autosomal recessive
C. X-linked dominant
Correct D. Polygenic inheri\tance

Correct Answer: D

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Question 9 View Details
A plant grows in a controlled environment with a cons\tant temperature and light intensity. What is the primary factor limiting its growth?
A. Water availability
B. Nutrient availability
C. Temperature
Correct D. Light intensity

Correct Answer: D

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Question 10 View Details
A researcher discovers a microorganism that exhibits a unique metabolic pathway. What is the most likely reason for this discovery?
Correct A. Evolutionary adaptation
B. Genetic mutation
C. Environmental influence
D. Random chance

Correct Answer: A

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Question 11 View Details
The human eye contains a lens that changes shape to focus on objects at different dis\tances. This is an example of a(n) _______ adaptation.
A. convergent
B. divergent
Correct C. accommodative
D. re\fractive

Correct Answer: C

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Question 12 View Details
The process by which microorganisms such as bacteria and viruses cause disease in humans is known as _______.
Correct A. infection
B. contamination
C. toxicity
D. allergenicity

Correct Answer: A

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Question 13 View Details
The nervous system is responsible for _______ and _______ in the human body.
A. movement, sensation
Correct B. sensation, movement
C. circulation, respiration
D. digestion, excretion

Correct Answer: B

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Question 14 View Details
The xylem is responsible for the transport of _______ in plants.
Correct A. water, minerals
B. sugars, amino acids
C. oxygen, carbon dioxide
D. nitrogen, phosphorus

Correct Answer: A

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Question 15 View Details
The diagram below shows the structure of a plant cell. Identify the part labeled _______.
A. plasma membrane
B. nucleus
Correct C. mitochondria
D. vacuole

Correct Answer: C

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Question 16 View Details
In a eukaryotic cell, the \endoplasmic reticulum is involved in the synthesis of proteins that are destined for secretion or for use within the cell. Which of the following statements is true about the \endoplasmic reticulum?
A. The \endoplasmic reticulum is a type of lysosome.
B. The \endoplasmic reticulum is a type of mitochondrion.
Correct C. The \endoplasmic reticulum is involved in the synthesis of proteins that are destined for secretion or for use within the cell.
D. The \endoplasmic reticulum is a type of golgi apparatus.

Correct Answer: C

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Question 17 View Details
A patient is diagnosed with a bacterial infection. The bacteria are gram-positive and have a thick peptidoglycan cell wall. Which of the following antibiotics would be most effective against this infection?
A. Penicillin
B. Ciprofloxacin
Correct C. Vancomycin
D. Metronidazole

Correct Answer: C

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Question 18 View Details
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell?
A. The cell will shrink due to water loss.
Correct B. The cell will swell due to water uptake.
C. The cell will remain unchanged.
D. The cell will burst due to osmotic pressure.

Correct Answer: B

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Question 19 View Details
A person is diagnosed with a vitamin B12 deficiency. Which of the following symptoms is most likely to occur?
Correct A. Fatigue and weakness
B. Diarrhea and abdominal pain
C. Confusion and disorientation
D. Rapid heartbeat and palpitations

Correct Answer: A

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Question 20 View Details
A patient is diagnosed with a fungal infection. The fungus is a type of dermatophyte. Which of the following antifungal medications would be most effective against this infection?
A. Fluconazole
B. Itraconazole
Correct C. Terbinafine
D. Amphotericin B

Correct Answer: C

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Question 21 View Details
In the context of classification of living things, which of the following is an example of a characteristic that is used to distinguish between prokaryotic and eukaryotic cells?
A. Cell wall
B. Presence of mitochondria
C. Size of the cell
Correct D. Type of genetic material

Correct Answer: D

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Question 22 View Details
What is the primary function of the mitochondria in a cell?
A. To synthesize proteins
B. To store genetic information
Correct C. To generate energy for the cell
D. To regulate cell growth

Correct Answer: C

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Question 23 View Details
In the process of respiration, what is the byproduct of the breakdown of glu\cose in the presence of oxygen?
Correct A. Carbon dioxide and water
B. Glu\cose and oxygen
C. Carbon dioxide and oxygen
D. Water and oxygen

Correct Answer: A

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Question 24 View Details
What is the term for the process by which plants convert light energy into chemical energy?
Correct A. Photosynthesis
B. Respiration
C. Decomposition
D. Fermentation

Correct Answer: A

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Question 25 View Details
In the context of reproduction, what is the term for the process by which an organism produces offspring without the involvement of gametes?
Correct A. Asexual reproduction
B. Sexual reproduction
C. Binary fission
D. Mitosis

Correct Answer: A

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