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1 of 15

Which of the following nutrients is primarily responsible for providing energy in the diets of animals?

Proteins

Fats

Vitamins

Minerals

2 of 15

The deficiency of vitamin D leads to

A. scurvy

B. pellagra

C. rickets

D. beriberi

3 of 15

Which organelle is primarily responsible for the synthesis of ATP, the energy currency of the cell?

Nucleus

Ribosome

Mitochondrion

Endoplasmic Reticulum

4 of 15

In a breeding program a cross was made between two true breeding cow-pea types: one with round seeds and the other with wrinkled seed. If roundness is dominant why wrinkleness is recessive, in the first filial generation all the seeds produced will be

A. 25% wrinkled, 75% round

B. 100% wrinkled

C. 50% wrinkled, 50% round

D. 75% wrinkled, 25% round

5 of 15

Which of the following types of vertebrae occur in equal numbers in the rabbit, rat and man?

A. Caudal

B. Thoracic

C. Lumber

D. Cervical

6 of 15

Which of the following strategies is most effective in ensuring the conservation of biodiversity in a specific ecosystem?

Establishing protected areas or reserves

Increasing urban development in rural areas

Promoting the use of synthetic materials over natural resources

Reducing public awareness campaigns about conservation

7 of 15

Which of the following strategies is most effective for ensuring the conservation of biodiversity in a specific ecosystem?

Implementing hunting regulations to control species population

Establishing protected areas such as national parks and wildlife reserves

Promoting urban development to increase land use efficiency

Encouraging the introduction of non-native species for agricultural purposes

8 of 15

Which structure in the respiratory system is primarily responsible for the exchange of oxygen and carbon dioxide between the air and the blood?

Trachea

Bronchi

Alveoli

Larynx

9 of 15

Which of the following best describes the role of DNA in the transmission of genetic characteristics in organisms?

DNA serves as the primary energy source for cellular processes.

DNA carries the genetic information that is passed from parents to offspring.

DNA is responsible for the synthesis of proteins only during cell division.

DNA regulates the pH levels in cells.

10 of 15

Which of the following ecological factors primarily determines the distribution of biomes around the world?

Soil composition

Latitude and climate

Presence of predators

Human activity

11 of 15

How many nuclei are found in pollen tube during fertilization?

A. 2

B. 3

C. 5

D. 6

12 of 15

In man, identical twins occur when

A. An ovum is fertilized by a sperm and then divide into two, each forming a separate embryo

B. an ovum fertilized by two sperms and then divides into two, each forming an embryo

C. two ova are fertilized at the same tine each forming an embryo

D. two ova are fertilized by a single sperm each forming an embryo after fertilization

13 of 15

Which of the following factors is most likely to lead to exponential growth in a population?

Limited resources

High predation rates

Abundant resources and favorable environmental conditions

Increased competition among species

14 of 15

Which of the following practices is most effective for maintaining biodiversity in a managed ecosystem?

Monoculture farming

Invasive species removal

Chemical pesticide application

Urban expansion

15 of 15

Which of the following best describes the role of DNA in the transmission of characteristics in organisms?

DNA acts as a catalyst for biochemical reactions.

DNA serves as a storage medium for energy in cells.

DNA contains the genetic instructions that dictate the development and functioning of living organisms.

DNA is responsible for the synthesis of proteins only in prokaryotic cells.

Biology Past Questions Practice

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