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TLS Online TPP Program

#Question id: 2120

Which one of the following statements about membranes is true?

#XL - S Microbiology

  1. Most plasma membranes contain more than 70% proteins.

  2. Sterol lipids are common in bacterial plasma membranes.

  3. Sterol lipids are common in human cell plasma membranes.

  4. The plasma membranes of all cell types within a particular organism have basically the same lipid and protein composition.

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TLS Online TPP Program

#Question id: 4602

#XL - S Microbiology

If the bacterium Staphylococcus aureus experiences a cost for maintaining one or more antibiotic-resistance genes, what would happen in environments that lack antibiotics?
TLS Online TPP Program

#Question id: 4603

#XL - S Microbiology

Of the following anatomical structures, which is homologous to the bones in the wing of a bird?
TLS Online TPP Program

#Question id: 4603

#XL - T Zoology

Of the following anatomical structures, which is homologous to the bones in the wing of a bird?
TLS Online TPP Program

#Question id: 4604

#XL - S Microbiology

Structures as different as human arms, bat wings, and dolphin flippers contain many of the same bones, which develop from similar embryonic tissues. These structural similarities are an example of ________.
TLS Online TPP Program

#Question id: 4605

#XL - S Microbiology

Over long periods of time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses?
TLS Online TPP Program

#Question id: 4605

#XL - T Zoology

Over long periods of time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses?