POST UTME CRAWFORD UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a eukaryotic cell, the \endoplasmic reticulum (ER) 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 ER?
A. The ER is a type of organelle found in prokaryotic cells.
B. The ER is responsible for the synthesis of proteins that are destined for use within the cell.
C. The ER is involved in the synthesis of proteins that are destined for secretion.
D. The ER is a type of organelle found in eukaryotic cells.
Question 2
In a eukaryotic cell, the process of mitosis involves the separation of chromosomes into two daughter cells. Which stage of mitosis is characterized by the condensation of chromosomes and the formation of the spindle apparatus?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 3
In a e\cosystem, the primary consumers are organisms that feed on producers. Which of the following is an example of a primary consumer?
A. Grasshopper
B. Frog
C. Snake
D. Bear
Question 4
A cell in the G2 phase of the cell cycle has a DNA content of 8C. What is the stage of the cell cycle that this cell will enter next?
A. G1
B. S
C. G2
D. M
Question 5
The human eye has a complex structure that allows it to detect light and transmit visual information to the brain. Which of the following is a type of cell found in the retina that is responsible for detecting light?
A. Rod cells
B. Cones
C. Bipolar cells
D. Ganglion cells
Question 6
A population of rabbits is introduced to a new island. The population grows rapidly at first, but eventually levels off. Which of the following is a possible explanation for this phenomenon?
A. The population is limited by the availability of food.
B. The population is limited by the availability of water.
C. The population is limited by the availability of space.
D. The population is limited by the availability of predators.
Question 7
A population of 1000 individuals has a mean height of 170 cm and a s\tandard deviation of 10 cm. If a random sample of 50 individuals is taken from this population, what is the probability that the sample mean height will be greater than 175 cm?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 8
In a human cell, the process of meiosis is initiated by the breakdown of the nuclear envelope. Which of the following structures is responsible for this breakdown?
A. Nuclear lamina
B. Nuclear envelope
C. Mitotic spindle
D. Centrioles
Question 9
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. However, this principle assumes a population size of infinite size. What is the term for the change in allele frequency that occurs when the population size is finite?
A. mutation
B. genetic drift
C. natural selection
D. genetic variation
Question 10
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope. Which of the following structures is responsible for this breakdown?
A. Nuclear lamina
B. Nuclear envelope
C. Mitotic spindle
D. Centrioles
Question 11
A diagram of a food web is shown below. Which of the following is a characteristic of a producer in this e\cosystem?
A. Consumes other organisms for energy.
B. Produces its own food through photosynthesis.
C. Decomposes dead organisms for nutrients.
D. Stores energy in the form of fat.
Question 12
The process of cellular respiration involves the breakdown of glu\cose to produce ATP. Which of the following is a byproduct of the citric acid cycle?
A. NADH
B. FADH2
C. ATP
D. pyruvate
Question 13
A diagram of the human eye is shown below. Which part of the eye is responsible for adjusting the size of the pupil?
A. A
B. B
C. C
D. D
Question 14
The process of mitosis involves the division of a cell into two daughter cells. Which of the following is a stage of mitosis?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 15
A plant has a genotype of BBSS. If the B allele is dominant and the S allele is recessive, what is the genotype of the offspring if the plant is crossed with a plant having the genotype bbss?
A. BbSs
B. Bbss
C. bbSS
D. bbss

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: