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TLS Online TPP Program

#Question id: 101

You have two bottles, each of which contains a white, crystalline substance. Your lab director tells you that one contains lactose and the other sucrose. Your job is to determine which bottle contains which sugar. Which procedure would you use?

#SCPH01 Biochemistry

  1. Test both for solubility in water. Sucrose is very soluble; lactose is only minimally soluble.

  2. Test for the ability to reduce Ag+. Only lactose will react.

  3. Dissolve each in water and record the pH. Lactose is far more acidic than sucrose.

  4. React each with bromine (Br2) water. Only sucrose will react.

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TLS Online TPP Program

#Question id: 4968

#SCPH06 I Botany

Which of these observations fails to support the endosymbiotic theory for the origin of eukaryotic cells?
TLS Online TPP Program

#Question id: 3007

#I Life Science/ Life Sciences Group – I-V

Bacterial endospores function in
TLS Online TPP Program

#Question id: 3675

#SCPH01 Biochemistry

Which describes the role of primase during replication?
TLS Online TPP Program

#Question id: 3674

#SCPH06 I Botany

Which property is shared by E. coli DNA polymerase I and DNA polymerase III?
TLS Online TPP Program

#Question id: 8852

#SCPH28 | Zoology

The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely explanation for these data?