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E. coli was engineered to express two different fluorescent proteins (GFP and RFP) under identical promoters. The strain is engineered such that the two proteins are expressed at a 1:1 […]

Co-operation, including seemingly altruistic behaviours can be advantageous when there is Reciprocity. This theory of reciprocal altruism provides one explanation for cases of seemingly altruistic behaviour by various animals (for […]

Over time, cracks and damage occur in concrete. One way to repair this is by introducing microbes into concrete during the building process. These would heal the concrete if cracks […]

Acorn worms have been extensively studied as a way to understand the evolution of the chordates. Which of the following features is a distinct chordate affinity found in acorn worms. […]

Species that live on mountain tops are more prone to extinction due to climatic warming. This is because: They are all long-lived, and adapting to these changes in climate is […]

On an expedition to Mars, the newest rovers discover microbial life. Yay! On further probing, scientists discover that Martian microbes also use DNA, RNA, and proteins. Researchers changed one nucleotide […]

An altered form of a replicative DNA polymerase lacks 3’→ 5’ exonuclease activity. This alteration would most likely result in which of the following? A decrease in processivity An increased […]

Which of the following phyla are considered diploblastic (i.e. consisting of two germ layers)? Echinodermata Chordata Mollusca Cnidaria Among the given options, only Cnidaria is diploblastic; Echinodermata, Chordata and Mollusca […]

Mature vertebrate erythrocytes always: Lack a nucleus Have a bi-concave shape Use haemoglobin to carry oxygen All of the above Correct option: The statement is not true for “mature vertebrate […]

While culturing a eukaryotic cell line, you add radio-labelled methionine in the culture media. After addition, you are able to cleanly separate individual organelles at different times. In which organelle […]