BSC2010 Final Exam Questions and Answers with Verified
Solutions | Latest Update
QUESTION
requirements for natural selection
Answer:
Variation, Heritability, Fitness, Overproduction of Offspring, & Adaptation.
QUESTION
whats genetic drift & how does it affect populations?
Answer:
- random changes in allele frequencies within a population over time.
- reduction in genetic diversity
QUESTION
scientific theory
Answer:
a well-supported explanation of natural phenomena
QUESTION
what happens during crossing over?
Answer:
homologous chromosomes exchange segments of genetic material during prophase I of meiosis.
QUESTION
Differences between passive & active transport.
Answer:
Passive - no energy required, (high ’ low concentration gradietnt) Active - Requires energy
(ATP). z (low ’ high)
QUESTION
True About DNA:
Answer:
- double helix
- backbone is made of deoxyribose sugars and phosphate groups. (A)(T) (C)(G)
- stores genetic information
- DNA replication is semi-conservative
, QUESTION
Which of the following is not true about DNA
Answer:
- DNA contains uracil (false—uracil is in RNA).
- DNA is single-stranded (false—RNA is single-stranded; DNA is double-stranded).
- DNA is made of ribose sugars (false—DNA has deoxyribose).
QUESTION
Monomers & their Polymers
Answer:
- Carbohydrates: Monosaccharides (e.g., glucose) ’ Polysaccharides (e.g., starch, glycogen,
cellulose).
- Amino Acids ’ Proteins (polypeptides).
- Nucleotides ’ Nucleic Acids (DNA, RNA).
- Fatty Acids + Glycerol ’ Lipids (e.g., triglycerides, phospholipids).
QUESTION
key organelles
Answer:
- Nucleus Function: Contains genetic material (DNA) and controls cell activities.
- Mitochondria Function: Powerhouse of the cell; produces energy (ATP) through cellular
respiration. Endoplasmic Reticulum (ER)
- Rough ER: Has ribosomes; synthesizes proteins. Smooth ER: Synthesizes lipids and detoxifies
harmful substances.
QUESTION
key organelles
Answer:
- Ribosomes Function: Protein synthesis (can be free-floating or attached to the rough ER).
- Golgi Apparatus Function: Modifies, sorts, and packages proteins and lipids for transport.
- Lysosomes Function: Breaks down waste and cellular debris using digestive enzymes.
QUESTION
key organelles
Answer:
- Peroxisomes Function: Breaks down fatty acids and detoxifies harmful substances (like
hydrogen peroxide).
- Cytoskeleton Function: Provides structural support and helps with cell movement and division.
- Centrosomes/Centrioles Function: Involved in organizing microtubules during cell division
(mitosis).
Solutions | Latest Update
QUESTION
requirements for natural selection
Answer:
Variation, Heritability, Fitness, Overproduction of Offspring, & Adaptation.
QUESTION
whats genetic drift & how does it affect populations?
Answer:
- random changes in allele frequencies within a population over time.
- reduction in genetic diversity
QUESTION
scientific theory
Answer:
a well-supported explanation of natural phenomena
QUESTION
what happens during crossing over?
Answer:
homologous chromosomes exchange segments of genetic material during prophase I of meiosis.
QUESTION
Differences between passive & active transport.
Answer:
Passive - no energy required, (high ’ low concentration gradietnt) Active - Requires energy
(ATP). z (low ’ high)
QUESTION
True About DNA:
Answer:
- double helix
- backbone is made of deoxyribose sugars and phosphate groups. (A)(T) (C)(G)
- stores genetic information
- DNA replication is semi-conservative
, QUESTION
Which of the following is not true about DNA
Answer:
- DNA contains uracil (false—uracil is in RNA).
- DNA is single-stranded (false—RNA is single-stranded; DNA is double-stranded).
- DNA is made of ribose sugars (false—DNA has deoxyribose).
QUESTION
Monomers & their Polymers
Answer:
- Carbohydrates: Monosaccharides (e.g., glucose) ’ Polysaccharides (e.g., starch, glycogen,
cellulose).
- Amino Acids ’ Proteins (polypeptides).
- Nucleotides ’ Nucleic Acids (DNA, RNA).
- Fatty Acids + Glycerol ’ Lipids (e.g., triglycerides, phospholipids).
QUESTION
key organelles
Answer:
- Nucleus Function: Contains genetic material (DNA) and controls cell activities.
- Mitochondria Function: Powerhouse of the cell; produces energy (ATP) through cellular
respiration. Endoplasmic Reticulum (ER)
- Rough ER: Has ribosomes; synthesizes proteins. Smooth ER: Synthesizes lipids and detoxifies
harmful substances.
QUESTION
key organelles
Answer:
- Ribosomes Function: Protein synthesis (can be free-floating or attached to the rough ER).
- Golgi Apparatus Function: Modifies, sorts, and packages proteins and lipids for transport.
- Lysosomes Function: Breaks down waste and cellular debris using digestive enzymes.
QUESTION
key organelles
Answer:
- Peroxisomes Function: Breaks down fatty acids and detoxifies harmful substances (like
hydrogen peroxide).
- Cytoskeleton Function: Provides structural support and helps with cell movement and division.
- Centrosomes/Centrioles Function: Involved in organizing microtubules during cell division
(mitosis).
