NEW
Font size
WorksheetsBiology Concepts for Grade 12
Total questions: 15
Worksheet time: 8mins
What is the basic unit of life?
Organism
Tissue
Atom
Cell
Which organelle is known as the powerhouse of the cell?
Ribosome
Mitochondria
Nucleus
Chloroplast
What is the process by which plants make their own food?
Digestion
Photosynthesis
Respiration
Transpiration
Which molecule carries genetic information?
Carbohydrates
RNA
DNA
Proteins
What is the primary function of ribosomes?
The primary function of ribosomes is to synthesize proteins.
To store genetic information
To transport nutrients within the cell
To generate energy for cellular processes
What type of bond holds the two strands of DNA together?
Ionic bonds
Covalent bonds
Peptide bonds
Hydrogen bonds
Which phase of mitosis is characterized by the alignment of chromosomes at the cell's equator?
Prophase
Anaphase
Telophase
Metaphase
What is the role of enzymes in biological reactions?
Enzymes slow down biological reactions by increasing activation energy.
Enzymes speed up biological reactions by lowering activation energy.
Enzymes are not involved in biological reactions at all.
Enzymes convert energy into heat during reactions.
Which process involves the conversion of glucose into energy in the absence of oxygen?
Photosynthesis
Cellular respiration
Glycolysis
Fermentation
What is the main function of the cell membrane?
To provide structural support to the cell
To store genetic information
The main function of the cell membrane is to control the movement of substances in and out of the cell.
To facilitate energy production in the cell
Which type of RNA is responsible for carrying amino acids to the ribosome?
mRNA
tRNA
rRNA
snRNA
What is the term for the variety of life in an ecosystem?
species richness
environmental stability
biodiversity
ecosystem health
Which part of the brain is responsible for regulating homeostasis?
Cerebellum
Frontal Lobe
Hypothalamus
Medulla Oblongata
What is the function of the chloroplast in plant cells?
To provide structural support
To store water and nutrients
The function of the chloroplast in plant cells is to conduct photosynthesis.
To facilitate cellular respiration
What is the significance of the Hardy-Weinberg principle in population genetics?
It focuses solely on phenotypic traits without considering genotypes.
The Hardy-Weinberg principle is significant in population genetics as it serves as a model for understanding genetic variation and evolutionary processes.
It eliminates the effects of natural selection on populations.
It predicts the exact genetic makeup of future generations.
