JUPEB 2024 BIOLOGY QUESTIONS
JUPEB 2024 BIOLOGY THEORY QUESTIONS BELOW
JUPEB 2024 BIOLOGY QUESTIONS 
JUPEB 2024 BIOLOGY QUESTIONS 
JUPEB 2024 BIOLOGY QUESTIONS
JUPEB 2024 BIOLOGY ANSWERS BELOW
BIOLOGY 002
a) Septate hyphae are characterized by the presence of cross-walls or septa, which divide the hyphae into separate compartments. This helps in the distribution of nutrients and waste products within the hyphae. On the other hand, aseptate hyphae lack septa and have a continuous growth without any internal divisions. This type of hyphae is commonly found in fungi.
b) Two examples of diseases caused by prions are Creutzfeldt-Jakob disease (CJD) and Variant Creutzfeldt-Jakob disease (vCJD).
c) The generation time of a bacterial population is the time required for a bacterial cell to divide and produce two daughter cells. In this case, the bacterial population increased from thousand cells to one million cells in four hours of growth. To calculate the generation time, we can use the formula:
Generation time = (Time for increase in population) / (Number of cell divisions)
In this case, the number of cell divisions can be calculated as:
Number of cell divisions = (Number of cells at the end) / (Number of cells at the beginning)
Number of cell divisions = (1,000,000) / (1,000)
Number of cell divisions = 1,000
Therefore, the generation time of the bacterial population is:
Generation time = (4 hours) / (1,000)
Generation time = 0.004 hours
Hence, the generation time of the bacterial population is 0.004 hours.
JUPEB BIOLOGY
NUMBER FIVE
(5a)
Draw the diagram
(5bi)
(PICK ANY FOUR)
(i) Phyllodes
(ii) Spines
(iii) Tendrils
(iv) Scales
(v) Stipules
(vi) Insectivorous leaves
(5bii)
(PICK ANY FOUR)
(i) Thorns
(ii) Tendrils
(iii) Bulbs
(iv) Rhizomes
(v) Tubers
(vi) Cladodes
(5ci)
(PICK ANY TWO)
(i) Cell elongation
(ii) Apical dominance
(iii) Root initiation
(iv) Fruit and seed development
(v) Tropic responses (e.g., phototropism, gravitropism)
(vi) Inhibition of lateral bud growth
(5cii)
(PICK ANY TWO)
(i) Cell division and differentiation
(ii) Delay of senescence (aging) in leaves
(iii) Promotion of shoot formation
(iv) Regulation of nutrient mobilization
(v) Induction of axillary bud break.
(vi) Regulation of root growth and development
JUPEB BIOLOGY
NUMBER SIX
(6ai)
(PICK ANY FOUR)
(i) They produce seeds, which are the main mode of reproduction.
(ii) They possess vascular tissues (xylem and phloem) for the transportation of water, minerals, and organic nutrients.
(iii) They have a well-developed root system for anchoring and absorbing water and minerals from the soil.
(iv) They have a stem that supports the plant, bears leaves, and facilitates the transport of materials.
(v) They have leaves, which are the main photosynthetic organs.
(vi) They exhibit alternation of generations, with a dominant sporophyte generation and a reduced gametophyte generation.
(6aii)
(PICK ANY THREE)
(i) Division Pinophyta (Coniferophyta) – Example: Pine (Pinus spp.)
(ii) Division Ginkgophyta – Example: Ginkgo biloba (Maidenhair tree)
(iii) Division Cycadophyta – Example: Cycas revoluta (Sago palm)
(iv) Division Gnetophyta – Example: Ephedra spp. (Mormon tea)
(v) Division Magnoliophyta (Angiospermae) – Example: Rose (Rosa spp.)
(vi) Division Pteridophyta (Ferns) – Example: Ostrich fern (Matteuccia struthiopteris)
(6bi)
The phloem is responsible for the transport of organic nutrients, primarily sucrose, produced during photosynthesis from the source (e.g., leaves) to the sink (e.g., roots, fruits, growing tissues). This transport is facilitated by the process of translocation, which is driven by the differences in water potential and the osmotic gradient created by the loading and unloading of sucrose.
(6bii)
(PICK ANY FOUR)
(i) Environmental concerns: Potential impact on biodiversity and the disruption of natural ecosystems due to the release of GM organisms.
(ii) Health concerns: Potential long-term effects of consuming GM foods on human health, such as the development of allergies or the transfer of antibiotic resistance genes.
(iii) Labeling and consumer choice: The debate over the mandatory labeling of GM foods to allow consumers to make informed choices.
(iv) Patenting and corporate control: The ethical issues surrounding the patenting of GM organisms and the potential for a small number of companies to control the global food supply.
(v) Socioeconomic impacts: The potential for GM crops to disrupt traditional farming practices and the livelihoods of small-scale farmers, especially in developing countries.
(vi) Ethical principles: Concerns about the violation of natural processes and the potential for unintended consequences when manipulating the genetic makeup of living organisms.
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