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WorksheetsBiology Semester 1 Review
Total questions: 45
Worksheet time: 23mins
When does crossing-over occur?
Prophase I of meiosis I
Metaphase I of meiosis I
Metaphase II of meiosis II
Prophase II of meiosis II
What is the result of crossing-over during meiosis?
Infinite possibilities of genetic variation
Random distribution of homologous chromosomes
New combinations of genes on each chromosome
Unique combinations of chromosomes in gametes
What type of biomolecule is an enzyme?
Carbohydrate
Lipid
Protein
Nucleic Acid
What is the primary function of enzymes in biological systems?
To provide energy for reactions
To speed up chemical reactions
To store genetic information
To transport molecules across cell membranes
Match the following functions to the biomolecule
Act as hormones
Lipid
Build muscle
Protein
Carry genetic information
Nucleic acid
Energy source (cellular respiration)
Carbohydrate
Which of the following is the building block of Carbohydrates?
Amino acids
Fatty acids
Monosaccharides
Viruses can only reproduce with the help of a (a) cell. This is another reason that viruses are not considered (b) things.
Where does TRANSCRIPTION occur?
Nucleus
Ribosome
Cytoplasm
Mitochondria
In what phase of the cell cycle does DNA replication take place?
G1
S
G2
Prophase
Why does DNA replicate?
To create a duplicate copy in case the original gets damaged
New cells will have a copy of the DNA
To create a new copy to replace the damaged original
Which do BOTH prokaryotes and eukaryotes contain?
nucleus
mitochondria
ribosomes
cell wall
A couple has three brown-eyed children. The parents are brown-eyed (Bb). The allele for brown eyes is dominant over the allele for blue eyes. They believe the fourth child they have will be blue-eyed. Which statement below explains what actually will happen?
The couple will have a blue-eyed fourth child.
The couple will have a brown-eyed fourth child.
They have a 75% chance of having a blue-eyed child.
They have a 25% chance of having a blue-eyed child.
What is the genotypic ratio of the offspring?
3 AA : 1 aa
1 AA : 3 aa
1 AA : 2 Aa : 1 aa
2 AA : 2 aa
Which organelle is responsible making food (Glucose) using sunlight?
Cell Membrane
Nucleus
Chloroplast
Mitochondria
Select all that are products of Photosynthesis.
Water
Carbon Dioxide
Oxygen
Sunlight (Light Energy)
Glucose (Sugar/food)
Which of the following is the correct equation for PHOTOSYNTHESIS?
light + carbon dioxide + water --> glucose + oxygen
carbon dioxide + sugar + water --> oxygen + light
oxygen + light + water --> carbon dioxide + sugar
carbon dioxide + oxygen + water --> Light+ Sugar
What mutation has occurred here?
T-G-A-C-C-A
T-G-A-G-C-A
Substitution
Deletion
Insertion
Frameshift
DNA molecule segment is : TTACGCAAG
The mutated DNA segment is TTCGCAAG. This is an example of ___ mutation.
Substitution
Deletion
Insertion
Inversion
Why are insertion and deletion (frameshift) mutations so harmful?
They change all of the codons from the mutation on down the line, which changes the amino acid sequence
They insert things that an organism doesn't need.
They often delete things that organisms need.
Insertion and deletions are not any more harmful than substitution mutations.
Cancer is defined as the
uncontrolled division of mutated cells
normal division of cells
normal DNA replication
abnormal ATP synthesis
