2023 WAEC Biology Essay & OBJ Answers [7th June]
Get Free Live 2023 WAEC May/June Biology (BIO) Essay (Theory) and Objectives (OBJ) Questions and Answers for School Candidates Free of Charge | WAEC May/June Free Biology Questions and Answers EXPO Room (7th June, 2023).
WAEC May/June 2023 FREE BIOLOGY ANSWER ROOM [School Candidates]

Wednesday, 7th June, 2023 
Biology 2 (Essay) – 09:30am – 11:10am
Biology 1 (Objective) – 11:10am – 12:00pm

2023 WAEC BIOLOGY OBJECTIVES (OBJ) ANSWERS:

1-10: CABADCCBCD
11-20: DBCDDBDDBC
21-30: ADAADADDCD
31-40: BCCBACBBBB
41-50: ABCCBCACDC

2023 WAEC BIOLOGY ESSAY OR THEORY ANSWERS:

 
 
OR


(2a)
[FILL IN THE TABLE WITH THIS]

IRON:
Function:
(PICK ANY ONE)
-Chlorophyll formation
-Electron transport in photosynthesis
-Enzyme activation
-Nitrogen fixation

Effects of deficiency in plants:
(PICK ANY ONE)
-Chlorosis (yellowing of leaves)
-Stunted growth
-Reduced fruit and seed production
-Interference with nutrient uptake

MOLYBDENUM:
Function:
(PICK ANY ONE)
-Nitrogen fixation
-Enzymatic reactions
-Iron uptake and utilization
-Seed germination and growth
-Chlorophyll formation

Effects of deficiency in plants:
(PICK ANY ONE)
-Reduced nitrogen fixation
-Chlorosis (yellowing of leaves)
-Impaired sulfur metabolism
-Abnormal phosphorus uptake
-Altered enzyme activity


POTASSIUM
Function:
(PICK ANY ONE)
-Osmotic regulation
-Enzyme activation
-Protein synthesis

Effects of deficiency in plants:
(PICK ANY ONE)
-Stunted growth.
-Leaf chlorosis.
-Weak stems.
-Reduced flower and fruit production.
-Increased susceptibility to diseases and pests.


COPPER
Function:
(PICK ANY ONE)
-It plays a vital role in activating various enzymes within plants
-It helps to facilitate photosynthesis
-It helps facilitate respiration in plants

(PICK ANY ONE)
Effects of deficiency in plants:
-Stunted growth
-Yellowing of leaves
-Death of plant tissue
-Reduced fertility
-Increased susceptibility to diseases

NITROGEN
Function:
(PICK ANY ONE)
-It helps in building proteins
-It is a fundamental constituent of nucleic acids and DNA
-It helps in formation of chlorophyll
-It helps in energy transfer and metabolism
-It is an enzyme co-factor

Effects of deficiency in plants:
(PICK ANY ONE)
-Reduced photosynthesis
-Poor protein synthesis
-Leaf necrosis
-Increased susceptibility to diseases and pests.
-Impaired nutrient transport

(2b)
(PICK ANY THREE)
(i) Fruits and Vegetables
(ii) Grains and Cereals
(iii) Legumes and Pulses
(iv) Nuts and Seeds
(v) Dairy Products
(vi) Meat, Poultry, and Fish

(2ci)
BUCCAL CAVITY:
(PICK ANY TWO)
(i) The buccal cavity is the entry point for food and liquids into the digestive system.
(ii) The buccal cavity is responsible for chewing or masticating food.
(iii) The buccal cavity contains salivary glands that produce saliva.
(iv) The buccal cavity plays a vital role in speech production.

(2cii)
DUODENUM
(PICK ANY TWO)
(i) The duodenum receives partially digested food from the stomach and continues the process of digestion.
(ii) The duodenum is involved in the absorption of nutrients from digested food.
(iii) The duodenum plays a role in regulating the overall process of digestion.
(iv) The duodenum secretes several important hormones that regulate various aspects of digestion.

(2ciii)
STOMACH
(PICK ANY TWO)
(i) One of the primary roles of the stomach is to store food temporarily after it has been ingested.
(ii) The stomach aids in the mechanical digestion of food through muscular contractions known as peristalsis.
(iii) The stomach secretes gastric juices, primarily composed of (HCl) and enzymes such as pepsin, which play a crucial role in chemical digestion.
(iv) The stomach controls the rate at which food is released into the small intestine.

(2d)
Glucose and fructose

 

 
 


OR


 
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