The Function of the Light-Tight Box That Forms the Main

question 29

Multiple Choice

The function of the light-tight box that forms the main structure of a camera is ______.

• A)to focus light on the film
• B)to prevent unwanted light from hitting the film
• C)to control the time of the exposure
• D)all of these are correct
• E)none of these are correct

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Definitions:

LncRNA

Long non-coding RNA; a type of RNA longer than 200 nucleotides that does not code for protein but has roles in regulating gene expression.

PiRNA

A class of small non-coding RNA molecules that are involved in the silencing of transposons and other gene regulatory functions primarily in the germline cells of animals.

Chromatin Structure

The complex of DNA and proteins, mainly histones, that forms chromosomes within the nucleus of eukaryotic cells, facilitating DNA packaging and gene expression regulation.

Initiator tRNA

The transfer RNA that recognizes the start codon on mRNA and initiates protein synthesis by bringing the first amino acid to the ribosome.