Light microscopes?

Question

Q1: Secretory proteins are:
A) Incorporated into the mitochondrial membrane
B) Produced by the cell for internal use
C) Chemically modified in the nucleus
D) Released from the cell through the plasma membrane
E) Produced by the ribosomes on the smooth endoplasmic reticulum.

Q2: Light microscopes:
A) work by reflecting electrons off the surface of an object being studied.
B) Typically provide more resolution than an electron microscope
C) can generally magnify objects about 10,000 times without blurring.
D) use light and glass lenses to magnify an image.
E) all of the choices are correct.

Answer 1

1. Secretory proteins are, by definition, "secreted" by the cell. That means that the cell produces them for use elsewhere in the body, and the proteins must be transported out of the cell, through the cell membrane. (And as a note, there are no ribosomes on the SMOOTH endoplasmic reticulum. The ribosomes are on the ROUGH ER.)

2. Light microscopes use light and glass lenses to magnify an image. They don't use electrons to create images, they're nowhere near as powerful as electron microscopes, and with all the fancy microscopes I've used in my time (both light microscopes and electron microscopes), I've never used a light microscope to magnify something 10,000 times. It would get too blurry at that magnification.

Answer 2

Definition of Light Microscopy
A light microscope uses focused light and lenses to magnify a specimen, usually a cell. In this way, a light microscope is much like a telescope, except that instead of the object being very large and very far away, it is very small and very close to the lens.

Light microscopes send light through a path that first focuses the light into a tight beam and then passes that light through a sample, which creates an image. That image then passes through one or more lenses to magnify it until it reaches the user's eye or a camera. Because light needs to pass through the sample, it must be either very small or very thin. Most cells (bacterial or otherwise) are both small and transparent, and so light can easily pass through them.

Answer 3

in fact that is what they specially ask in tests- optic microscope (common microscope) makes use of long wavelengths, and a lens with a magnifier in, so which you will discover gadgets yet now not besides as an electron microscope as an electron microscope has a smaller wavelength, which creates a greater perfect determination(the flexibility to distinguish between 2 close gadgets) there is likewise 2 styles of electron microscope, transmission and scanning. we did this in September so its sturdy revision for me :) a transmission microscope makes use of a small bypass area of the pattern, so it must be lifeless, that could be a draw back to it. It sends beams of electrons to the pattern and it produces the image on a photographic plate.you ought to confirm the extremely cellular organelles, in a 2d photograph on a exhibit screen, its very hi tech so faculties an faculties do now not use it! Scanning microscope can produce a greater effective high quality 3-D image. desire that is a few help, some revision for me :)

Answer 4

Q1. D. Secretory proteins are released from the cell through the plasma membrane.

Q2. D. Light microscopes use light and glass lenses to magnify an image.

Answer 5

Q1. E. The ribosomes produce proteins in the cell...
Q2. D. is the best answer from the group that are available.. everything else is wrong.

Answer 6

number 1 is E. and 2 might b D