UGG 117 and 118 Biology Quiz

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Questions and Answers

What term refers to the identification and study of organ systems of plants and animals?

  • Anatomy (correct)
  • Taxonomy
  • Morphology
  • Systematics

In chromatin structure, what appears as a 'beads on a string' structure when observed under an electron microscope?

  • Nucleosome
  • Supercoiled filament
  • Solenoid (correct)
  • Filament

Which plant growth regulator is commonly known as the 'stress' hormone?

  • Gibberellins
  • Ethylene
  • Cytokinins
  • Abscisic acid (correct)

What is the peak absorption wavelength of the reaction center chlorophyll a in Photosystem I (PSI) and Photosystem II (PSII) respectively?

<p>680 nm and 700 nm (B)</p> Signup and view all the answers

Which component of the bacterial cell envelope provides structural support to prevent the bacterium from bursting or collapsing?

<p>Cell wall (B)</p> Signup and view all the answers

Calotropis, a weed, prevents herbivory by producing which compound?

<p>Cardiac glycosides (B)</p> Signup and view all the answers

What is the direct result of primary productivity in most ecosystems?

<p>Photosynthesis (A)</p> Signup and view all the answers

Which organism is responsible for forming nodules on the roots of leguminous plants?

<p>Rhizobium (B)</p> Signup and view all the answers

Which group of algae has a plant body consisting of a root-like holdfast, stem-like stipe, and leaf-like frond?

<p>Phaeophyceae (D)</p> Signup and view all the answers

What happens if oxygen availability to activated sludge flocs is reduced in a sewage treatment plant?

<p>The rate of degradation of organic matter slows down, leading to anoxic conditions in the flocs. (A)</p> Signup and view all the answers

Which bacterial enzyme is encoded by the Ori gene in pBR322?

<p>Ori (B)</p> Signup and view all the answers

What are the subunits that make up ribosomes in prokaryotes?

<p>50S and 30S (D)</p> Signup and view all the answers

During the conversion of pyruvic acid to Acetyl-CoA in the presence of oxygen, what happens to pyruvic acid?

<p>It gets oxidized. (C)</p> Signup and view all the answers

Which statement about carotenoid pigments like carotene and xanthophylls is correct?

<p>They are present on chromoplasts. (C)</p> Signup and view all the answers

In the anatomy of a dicot root, which term should NOT be included under the stele?

<p>Pith (C)</p> Signup and view all the answers

When both glucose and lactose are available to E.coli, what allows transcription to occur?

<p>Both A and B. (D)</p> Signup and view all the answers

What is the incorrect statement about ribosomes in prokaryotes?

<p>$2.$ Ribosomes are made of 50S and 30S subunits, forming 80S ribosomes. (D)</p> Signup and view all the answers

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