LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

CELL BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A student observed palisade cells using a microscope. The microscope had four objective lenses, each with a different magnification. Which objective lens should the student use first?
A
×4 magnification
B
×10 magnification
C
×40 magnification
D
×100 magnification
Explanation: 

Detailed explanation-1: -Below the epidermis (top layer of cells), are two layers of column-like cells known as palisade cells. These contain large numbers of chloroplasts and are the principal sites of photosynthesis. Magnification: x240 at 35mm size.

Detailed explanation-2: -A compound light microscope often contains four objective lenses: the scanning lens (4X), the low-power lens (10X), the high-power lens (40 X), and the oil-immersion lens (100 X).

Detailed explanation-3: -Which Microscope Objective Should I Start With? Start Low! Since the 4x objective lens has the least magnification, but a larger field of view, it allows for more of the specimen to be seen, as well as locating the part of the sample you wish to view. This in turn makes it easier to focus on the sample.

Detailed explanation-4: -To get the total magnification level you must multiply the magnification of the ocular lens by the magnification of the objective lens. So, if you are viewing your slide under the 40x objective lens you would multiply that by the 10x of the ocular lens for a total magnification of 400x.

There is 1 question to complete.