Biology, 2020, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2020

Title :

Biology

Exam :

JAMB Exam

Paper 1 | Objectives

1 - 10 of 40 Questions

#	Question	Ans
1.	The hormone which regulates the amount of glucose in the blood is called? A. Adrenalin B. Auxin C. Insulin D. Thyroxine Show Content Detailed Solution Insulin helps control blood glucose levels by signaling the liver and muscle and fat cells to take in glucose from the blood. There is an explanation video available below.	C
2.	Deamination occurs in the? A. Kidney B. Pancreas C. Spleen D. Liver Show Content Detailed Solution Deamination is used to break down amino acids for energy, and occurs primarily in the liver. There is an explanation video available below.	D
3.	In an agricultural ecosystem, the biotic component consist of A. crops, pests and beneficial insects B. crops, temperature and humidity C. pests, beneficial insects and water D. crops, water and soil Show Content Detailed Solution The living components of an ecosystem are called the biotic components, option A has all living components. There is an explanation video available below.	A
4.	Epiphytes growing on the branches of trees provide an example of the relationship known as? A. parasitism B. commensalism C. saprophytism D. holophytism Show Content Detailed Solution Commensalism is a type of symbiosis, specifically, a biological relationship in which one specie benefits from an interaction, while the host species is neither positively or negatively affected to any tangible degree. There is an explanation video available below.	B
5.	The hypha of rhizopus is said to be non-septate because it A. does not contain chloropyll B. has no cross wall C. is vacuoled D. stores oil globus Show Content Detailed Solution Hyphae that have walls between the cells are called septate hyphae; hyphae that lack walls and cell membranes between the cells are called nonseptate or coenocytic hyphae) There is an explanation video available below.	B
6.	The function of ribosome in cells is A. protein synthesis B. starch synthesis C. transport of material D. lipid storage Show Content Detailed Solution A ribosome is a cell organelle. It functions as a micro-machine for making proteins. There is an explanation video available below.	A
7.	In which of the following does external fertilization take place? A. toad B. lizard C. bird D. cockroach Show Content Detailed Solution External fertilization is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg outside of the female's body. Many fish, amphibians, and other sexual aquatic animals use external fertilization (the exceptions are aquatic mammals, sharks, and some other special types of fish). There is an explanation video available below.	A
8.	The villus in the small intestine is significant because A. Increases the surface area for absorption B. increases the surface area for digestion C. assists in mixing digested food D. assists in filtering undigested food Show Content Detailed Solution Villis are specialized for absorption in the small intestine as they have a thin wall, one cell thick, which enables a shorter diffusion path. There is an explanation video available below.	A
9.	The butterfly is of great economic importance because A. of it's use in scientific studies B. it sucks nectar from flowers C. it adds to the beauty of the environment D. it pollinates flowers of crops and other plants Show Content Detailed Solution Butterflies are important pollinators to most agricultural crops. There is an explanation video available below.	D
10.	The bright colours of the comb and feathers in the peacock are for? A. sex differentiation B. beauty C. courtship D. defence Show Content Detailed Solution The males display their beautiful fanned trains as part of their courtship behaviour to the Peahens. There is an explanation video available below.	C

1.	The hormone which regulates the amount of glucose in the blood is called? A. Adrenalin B. Auxin C. Insulin D. Thyroxine Show Content Detailed Solution Insulin helps control blood glucose levels by signaling the liver and muscle and fat cells to take in glucose from the blood. There is an explanation video available below.	C
2.	Deamination occurs in the? A. Kidney B. Pancreas C. Spleen D. Liver Show Content Detailed Solution Deamination is used to break down amino acids for energy, and occurs primarily in the liver. There is an explanation video available below.	D
3.	In an agricultural ecosystem, the biotic component consist of A. crops, pests and beneficial insects B. crops, temperature and humidity C. pests, beneficial insects and water D. crops, water and soil Show Content Detailed Solution The living components of an ecosystem are called the biotic components, option A has all living components. There is an explanation video available below.	A
4.	Epiphytes growing on the branches of trees provide an example of the relationship known as? A. parasitism B. commensalism C. saprophytism D. holophytism Show Content Detailed Solution Commensalism is a type of symbiosis, specifically, a biological relationship in which one specie benefits from an interaction, while the host species is neither positively or negatively affected to any tangible degree. There is an explanation video available below.	B
5.	The hypha of rhizopus is said to be non-septate because it A. does not contain chloropyll B. has no cross wall C. is vacuoled D. stores oil globus Show Content Detailed Solution Hyphae that have walls between the cells are called septate hyphae; hyphae that lack walls and cell membranes between the cells are called nonseptate or coenocytic hyphae) There is an explanation video available below.	B

6.	The function of ribosome in cells is A. protein synthesis B. starch synthesis C. transport of material D. lipid storage Show Content Detailed Solution A ribosome is a cell organelle. It functions as a micro-machine for making proteins. There is an explanation video available below.	A
7.	In which of the following does external fertilization take place? A. toad B. lizard C. bird D. cockroach Show Content Detailed Solution External fertilization is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg outside of the female's body. Many fish, amphibians, and other sexual aquatic animals use external fertilization (the exceptions are aquatic mammals, sharks, and some other special types of fish). There is an explanation video available below.	A
8.	The villus in the small intestine is significant because A. Increases the surface area for absorption B. increases the surface area for digestion C. assists in mixing digested food D. assists in filtering undigested food Show Content Detailed Solution Villis are specialized for absorption in the small intestine as they have a thin wall, one cell thick, which enables a shorter diffusion path. There is an explanation video available below.	A
9.	The butterfly is of great economic importance because A. of it's use in scientific studies B. it sucks nectar from flowers C. it adds to the beauty of the environment D. it pollinates flowers of crops and other plants Show Content Detailed Solution Butterflies are important pollinators to most agricultural crops. There is an explanation video available below.	D
10.	The bright colours of the comb and feathers in the peacock are for? A. sex differentiation B. beauty C. courtship D. defence Show Content Detailed Solution The males display their beautiful fanned trains as part of their courtship behaviour to the Peahens. There is an explanation video available below.	C