Practice post utme coal city university biology 2021 Past Questions

Question 1

In a eukaryotic cell, what is the primary function of the Golgi apparatus?

A. Protein synthesis

B. Cell signaling

Correct C. Modification and transport of proteins and lipids

D. Cell division

Correct Answer: C

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Question 2

What is the process by which plants convert light energy into chemical energy?

A. Respiration

Correct B. Photosynthesis

C. Decomposition

D. Fermentation

Correct Answer: B

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Question 3

What is the term for the movement of water from the roots to the leaves of a plant?

Correct A. Transpiration

B. Respiration

C. Photosynthesis

D. Osmosis

Correct Answer: A

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Question 4

What is the process by which cells divide to produce two daughter cells?

Correct A. Mitosis

B. Meiosis

C. Binary fission

D. Endosymbiosis

Correct Answer: A

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Question 5

What is the term for the movement of molecules from an area of high concentration to an area of low concentration?

Correct A. Diffusion

B. Osmosis

C. Active transport

D. Passive transport

Correct Answer: A

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Question 6

In a population of 1000 bacteria, 80% are resis\tant to antibiotic A. If 200 bacteria are randomly selected for treatment, what is the probability that at least 150 will be resis\tant to antibiotic A?

A. 0.25

B. 0.30

Correct C. 0.35

D. 0.40

Correct Answer: C

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Question 7

A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. If the gas is heated to 127°C at cons\tant volume, what is the new pressure?

A. 2.5 atm

B. 3.5 atm

Correct C. 4.5 atm

D. 5.5 atm

Correct Answer: C

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Question 8

A plant grows from a seed in a controlled environment. If the plant grows 2 cm in the first day, 3 cm in the second day, and 4 cm in the third day, what is the average rate of growth per day?

A. 3 cm/day

Correct B. 3.5 cm/day

C. 4 cm/day

D. 4.5 cm/day

Correct Answer: B

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Question 9

A 10 L \tank contains 5 L of a 0.5 M solution of NaCl. If 2 L of a 1.0 M solution of NaCl is added to the \tank, what is the new concentration of NaCl?

A. 0.6 M

B. 0.7 M

Correct C. 0.8 M

D. 0.9 M

Correct Answer: C

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Question 10

A 50 kg person is s\tanding on a scale in an elevator. If the elevator accelerates upward at 2 m/s^2, what is the reading on the scale?

A. 500 N

B. 550 N

Correct C. 600 N

D. 650 N

Correct Answer: C

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Question 11

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. 0.64

B. 0.36

C. 0.16

D. 0.04

Correct Answer: A

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Question 12

A diagram of the human brain is shown below. Which part of the brain is responsible for proces\sing visual information?

Correct A. Cerebrum

B. Cerebellum

C. Brainstem

D. Spinal Cord

Correct Answer: A

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Question 13

A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'rr'?

Correct A. 0.25

B. 0.5

C. 0.75

D. 1.0

Correct Answer: A

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Question 14

A diagram of the human eye is shown below. Which part of the eye is responsible for focu\sing light onto the retina?

A. Cornea

B. Iris

Correct C. Lens

D. Retina

Correct Answer: C

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Question 15

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?

A. 1600

B. 3200

C. 6400

Correct D. 12800

Correct Answer: D

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Question 16

In a tropical rainforest, the nutrient cycle is primarily driven by the decomposition of organic matter by which of the following organisms?

A. Fungi

Correct B. Bacteria

C. Protozoa

D. Rotifers

Correct Answer: B

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Question 17

The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of which of the following?

A. ATP

B. NADPH

Correct C. Glu\cose

D. Oxygen

Correct Answer: C

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Question 18

The xylem in plants is responsible for transporting which of the following subs\tances?

Correct A. Water and minerals

B. Sugars and amino acids

C. Oxygen and carbon dioxide

D. Hormones and waste products

Correct Answer: A

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Question 19

The process of meiosis in reproductive cells involves the reduction of the chromosome number by half, resulting in the production of which of the following?

Correct A. Gametes

B. Zygotes

C. Sperm and egg cells

D. Embryos

Correct Answer: A

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Question 20

The concept of natural selection, as proposed by Charles Darwin, involves the survival and reproduction of individuals with which of the following characteristics?

A. Stronger limbs

B. Brighter plumage

Correct C. Improved camouflage

D. Increased intelligence

Correct Answer: C

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Question 21

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

Correct B. 0.64

C. 0.48

D. 0.72

Correct Answer: B

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Question 22

A researcher is studying the effect of pH on the activity of the enzyme catalase. If the enzyme is most active at a pH of 7.0, what can be concluded about the enzyme's optimal pH?

Correct A. The enzyme is most active at a pH of 7.0.

B. The enzyme is least active at a pH of 7.0.

C. The enzyme's optimal pH is between 6.0 and 8.0.

D. The enzyme's optimal pH is between 4.0 and 6.0.

Correct Answer: A

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Question 23

A species of bird has a wing span of 1.5 meters. If the bird is flying at a speed of 50 km/h, what is the bird's angular velocity?

A. 0.01 rad/s

Correct B. 0.0175 rad/s

C. 0.025 rad/s

D. 0.05 rad/s

Correct Answer: B

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Question 24

A population of rabbits is growing at a rate of 20% per year. If the population is currently 1000 rabbits, what will be the population after 5 years?

A. 1000

B. 2000

Correct C. 3185.94

D. 5000

Correct Answer: C

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Question 25

A species of plant has a photosynthetic rate of 10 mg CO2/m^2/s. If the plant is exposed to light for 8 hours a day, what is the total amount of CO2 fixed by the plant per day?

A. 12000

B. 24000

Correct C. 38400

D. 48000

Correct Answer: C

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