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1. One repair mechanism for double-strand breaks involves the unwinding of the damaged DNA followed by the invasion of a template that contains
identical or highly similar sequences as the damaged DNA.
What is the name of this mechanism?
Nucleotide excision repair
Nonhomologous end joining
Homologous recombination
Mismatch repair
2. The promoter region contains a consensus sequence where transcription factors bind to initiate transcription.
Which of the following is the promoter consensus sequence found in eukaryotes?
C) Pribnow box
AAUAAA sequence
Shine-Dalgarno sequence
Goldberg-Hogness box
3. Which homologous organs are correctly matched to each other?
C) Bird’s wing and bat’s wing
Carrot and potato
Fish’s tail fins and whale’s tail fins
A pitcher plant’s flytrap and a poinsettia’s bracts
4. Which stage of cell division contains the most amount of DNA?
C) Telophase
Prophase
Cytokinesis
None of the above.
5. For organism Z, 2n = 36.
What is the diploid chromosome number (2n) and DNA content (C) of organism Z during the prophase stage?
n=36; C=36
n=72; C=36
n=36; C=72
n=72; C=72
6. Due to a prolonged heat wave in a certain island, the majority of Organism M with thin, brown fur died while a number of Organism M with thick, black
fur survived. The remaining members of Organism M who survived moved to another unoccupied island and was able to interbreed and establish a new
colony.
This event is an example of .
Random mutation
Bottleneck Effect
Founder Effect
Both B and C
7. Which type of biome describes an environment where evergreen trees are found?
Taiga
Temperate deciduous forest
Tropical rainforest
Tundra
8. Mistletoes obtain nutrition by attaching to a plant (usually a tree) using a structure called haustorium, then extracting the plant’s water and nutrients.
What type of relationship do a mistletoe and a tree have?
Commensalism
Mutualism
Parasitism
Predation
9. Some plants have modified the structure of their stems in order to adapt to their habitat and the environment.
What type of stem modification is usually observed in cacti wherein the stem is flattened and has a leaf-like shape?
Tendril
Cladode
Stolon
Corm
10. Which of the following is NOT true about telomeres?
It contains a set of genes
It is composed of short nucleotide repeats
It is located at the end of a chromosome
It plays an essential role in the aging process of humans
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