Which kinds of mutation tend to have the most dramatic effects on protein structure?

A) all mutations are equally dramatic
B) those which change a single base that do not result in a change in the amino acid
C) those which change a single base that result in a single amino acid being changed
D) those that add or delete a base within a gene


D

Physics & Space Science

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The period of an oscillating weight on a spring in an inertial frame of reference is 2.5 s. What would be its speed if it were to move by an observer who measures its period as 3.4 s? (c = 3.00 × 10^8 m/s)

a. 1.5 × l08 m/s b. 2.0 × 10^8 m/s c. 2.8 × l08 m/s d. 6.8 × 10^7 m/s e. 1.3 × 10^8 m/s

Physics & Space Science

Which of these is NOT typical of a condensing protostar?

A) magnetic fields producing polar flows B) dusty disks around their equators C) Herbig-Haro objects projecting a light year out in space D) fusion of helium into carbon in their cores E) more infrared than visible light given off from the cocoon of dust around the star

Physics & Space Science

In most extrasolar planetary systems the center of mass is likely to be located

A) midway between the star and its most massive planet B) close to the center of the parent star C) exactly at the center of the parent star D) close to the center of the most massive planet

Physics & Space Science

Jenny drives at a constant speed of 15 m/s around a circular drive of diameter 60 meters

(a) Determine her acceleration in m/s2. (b) Is her acceleration tangential, centripetal, or centrifugal? (c) Is her velocity tangential, centripetal, or centrifugal?

Physics & Space Science