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Biology — Advanced
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AdvancedScience
Today's questions
Today's quiz questions
These are the questions that make up today's quiz. Test your knowledge, see how much you know, and learn from the explanation behind every answer.
1.What is the function of microRNA (miRNA)?
- •Short RNA molecules that serve as primers for DNA replication
- •RNA molecules that catalyze the splicing of introns
- •Large RNA molecules that form the structural core of ribosomes
- •Small non-coding RNA molecules that regulate gene expression by binding to complementary mRNA, leading to its degradation or translational repression
2.What is the RNA world hypothesis?
- •The hypothesis that RNA was created artificially in early laboratories
- •The theory that RNA viruses were the first life forms on Earth
- •The hypothesis that early life was based on RNA molecules that could both store genetic information and catalyze chemical reactions before DNA and proteins evolved
- •The idea that RNA is more important than DNA in modern organisms
3.What is metagenomics?
- •The comparison of genomes between different species
- •The study of how genes interact within a single organism
- •The study of genetic material recovered directly from environmental samples, allowing analysis of microbial communities without culturing
- •The analysis of fossilized DNA from extinct species
4.What is epigenetics?
- •The study of mutations caused by radiation exposure
- •The study of heritable changes in gene expression that do not involve changes to the DNA sequence
- •The study of gene mapping on chromosomes
- •The study of genetic disorders caused by extra chromosomes
5.What is the role of the p53 gene?
- •It controls the production of telomerase in stem cells
- •It is an oncogene that promotes cell division when activated
- •It encodes the protein that replicates DNA during S phase
- •It is a tumor suppressor gene that halts the cell cycle after DNA damage
6.What is the function of the p53 protein?
- •It catalyzes the synthesis of ATP
- •It acts as a tumor suppressor by regulating cell cycle and apoptosis
- •It transports oxygen in the blood
- •It promotes cell division and growth
7.What is the Calvin cycle?
- •A cycle of cell division in meristematic tissue
- •The light-independent reactions of photosynthesis that fix CO₂ into glucose
- •The light-dependent reactions that split water molecules
- •The cycling of nitrogen in the atmosphere
8.What is Hardy-Weinberg equilibrium?
- •The equilibrium point where enzyme activity is maximized
- •The balance between predator and prey populations in an ecosystem
- •A state where allele and genotype frequencies remain constant in a population across generations
- •The balance of water and solutes in a cell
9.What is the role of telomerase?
- •It unwinds the DNA double helix for replication
- •It joins Okazaki fragments on the lagging strand
- •It repairs mismatched bases in DNA
- •It extends telomeres to prevent chromosome shortening during replication
10.What is a prion?
- •A type of RNA that regulates gene expression
- •A small virus that infects bacteria
- •A misfolded protein that can induce other proteins to misfold, causing neurodegenerative disease
- •A bacterial toxin that causes food poisoning