Biology Quiz 2

Biology Quiz 2

Which of the following reactions is catalyzed by high-energy UV radiation in the stratosphere?

O₂ + O → O₃

O₂ → O + O

O₃ + O₃ → 3O₂

O + O → O₂

Which one of the following organisms respires through the skin?

Blue Whale

Salamander

Platypus

Keratinocite

Which of the following statement is true about trypsinogen?

It is activated by enterokinase

Activated by renin

Activated by pepsin

It does not need activation

Which one of the human cells lacks a nucleus?

Neutrophil

Neuron

Mature Erythrocyte

Keratinocyte

The first enzyme that the food encounters in the human digestive system

Pepsin

Trypsin

Chymotrypsin

Amylase

Glycoproteins are formed in which one of the following organelles?

Peroxisome

Lysosome

Golgi Apparatus

Mitochondria

Which cells of crypts of Lieberkuhn secrete antibacterial lysosomes?

Argentaffin cells

Paneth cells

Zymogen cells

Kupffer cells

Which among the following are the smallest living cells?

Bacillus

Pseudomonas

Mycoplasma

Nostoc

The cells responsible for extracting energy from carbohydrates to form ATP is

Lysosome

Lysosome Ribosome

Chloroplast

Mitochondrion

DNA fragments are

Positively charged

Negatively charged

Neutral

Either positively charged or negatively charged depending on their size

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