Factor(s) which can influence enzyme activity is/are
1) high temperature 2) pH 3) substrate concentration 4) all of these Answer:4) all of these Explanation: Enzymes show maximum... View Article
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_________ Catalyse covalent bonding between two molecules to form a large molecule.
1) Hydrolases 2) Transferases 3) Isomerases 4) Ligases Answer:4) Ligases Explanation: Ligases catalyse linking of two compounds by formation of... View Article
Most of the biochemical reactions differ from those occurring in the non-living world in
1) being spontaneous 2) releasing energy 3) being enzymatic 4) requiring energy Answer:3) being enzymatic Explanation: In the living system,... View Article
A complex polysaccharide produced from sucrose by the bacterium Leuconostoc mesenteroides is:
1) Chitin 2) Starch 3) Cellulose 4) Dextran Answer:4) Dextran Explanation: Dextran is produced by the bacteria Leuconostoc mesenteroides by... View Article
Most animal lipids are composed of ______ fatty acids, whereas most plant lipids are composed of _______ fatty acids.
1) unsaturated; saturated 2) saturated; unsaturated 3) saturated; saturated 4) unsaturated; unsaturated Answer:2) saturated; unsaturated Explanation: Animal fats are usually... View Article
Cellulose, the most important constituent of the plant cell wall is made up of
1) unbranched chain of glucose molecules linked by an alpha 1,4-glycosidic bond. 2) branched chains of glucose molecules linked by... View Article
Which of the following is a heteropolysaccharide?
1) Peptidoglycan 2) Starch 3) Inulin 4) Chitin Answer:1) Peptidoglycan Explanation: Heteropolysaccharide is a polymer having more than one type... View Article
Choose the group of polysaccharides.
1) Starch, glycogen, cellulose 2) Sucrose, maltose, glucose 3) Glucose, fructose, lactose 4) Galactose, starch, sucrose Answer:1) Starch, glycogen, cellulose... View Article
Carbohydrates, the most abundant biomolecules on Earth are produced by:
1) Some bacteria, algae and green plants 2) Fungi, algae and green plants 3) All bacteria, fungi and algae 4)... View Article
About 98% of the mass of every living organism is composed of just six elements, which are carbon, hydrogen, nitrogen, oxygen, ______ and _______.
1) Sulphur, magnesium 2) Magnesium, sodium 3) Calcium, phosphorus 4) Phosphorus, sulphur Answer:3) Calcium, phosphorus Explanation: About 98% of the... View Article
The major set of elements in living beings are
1) Silicon, magnesium, calcium 2) Carbon, magnesium, silicon 3) Hydrogen, iron, cobalt 4) Carbon, hydrogen, oxygen Answer:4) Carbon, hydrogen, oxygen... View Article
What is the difference between Hydrarch succession and Xerarch succession?
Hydrarch succession occurs in wet areas and progresses from hydric to mesic conditions (neither too wet nor too dry), whereas... View Article
Why is the pyramid of energy always upright?
The pyramid of energy is always upright because when energy flows from one trophic level to another, there is always... View Article
Which type of pyramid is inverted?
Mostly the ecological pyramids, i.e. pyramid of biomass, number and energy are upright as the producers are more than herbivores... View Article
Which pyramid of biomass is inverted?
The pyramid of biomass of sea is mostly inverted due to the small standing crop of phytoplankton (primary producers) supporting... View Article
What types of toxins can be released by harmful algal blooms?
Rapid multiplication of algae in the water due to the presence of abundant nutrients are called algal blooms. Some algae... View Article
Are algal blooms harmful to humans?
Yes, algal blooms are harmful to humans. Some algae produce toxins that are harmful to humans and animals. They can... View Article
What are the main causes of algal blooms?
The main causes of algal blooms are excess nutrients (rich in nitrogen and phosphorus), higher temperatures, slow-moving water and the... View Article
What is an algal bloom and what causes it?
The rapid growth of algae in a water body is called an algal bloom. It is caused due to nutrient... View Article
What are the 4 main causes of extinction?
There are four main causes of extinction or biodiversity loss. These are described as ‘The Evil Quartet’. They are: Habitat... View Article
